| blastopore | (noun) the opening into the archenteron | - |
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| blastoporic | (adjective) of or relating to a blastopore | Synonyms: blastoporal |
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| blastosphere | (noun) early stage of an embryo produced by cleavage of an ovum; a liquid-filled sphere whose wall is composed of a single layer of cells; during this stage (about eight days after fertilization) implantation in the wall of the uterus occurs | Synonyms: blastula |
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| blastospheric | (adjective) of or relating to a blastula | Synonyms: blastular |
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| blastula | (noun) early stage of an embryo produced by cleavage of an ovum; a liquid-filled sphere whose wall is composed of a single layer of cells; during this stage (about eight days after fertilization) implantation in the wall of the uterus occurs | Synonyms: blastosphere |
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| blastular | (adjective) of or relating to a blastula | Synonyms: blastospheric |
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| blat | (verb) cry plaintively | Synonyms: baa, blate, bleat |
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| blatancy | (noun) the property of being both obvious and offensive | - |
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| blatant | (adjective) conspicuously and offensively loud; given to vehement outcry | Synonyms: clamant, clamorous, strident, vociferous |
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| (adjective) without any attempt at concealment; completely obvious | Synonyms: blazing, conspicuous |
| blatantly | (adverb) in a blatant manner | - |
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| blate | (adjective) disposed to avoid notice | Synonyms: bashful |
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| (verb) cry plaintively | Synonyms: baa, blat, bleat |
| blather | (noun) foolish gibberish | Synonyms: blatherskite |
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| (verb) to talk foolishly | Synonyms: babble, blether, blither, smatter |
| blatherskite | (noun) foolish gibberish | Synonyms: blather |
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| blaxploitation | (noun) the exploitation of black people (especially with regard to stereotyped roles in movies) | - |
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| blaze | (noun) noisy and unrestrained mischief | Synonyms: hell |
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| (noun) a light within the field of vision that is brighter than the brightness to which the eyes are adapted | Synonyms: brilliance, glare |
| (noun) a light-colored marking | - |
| (noun) a cause of difficulty and suffering | Synonyms: hell |
| (noun) a strong flame that burns brightly | Synonyms: blazing |
| (verb) indicate by marking trees with blazes | - |
| (verb) shoot rapidly and repeatedly | Synonyms: blaze away |
| (verb) move rapidly and as if blazing | Synonyms: blaze out |
| (verb) burn brightly and intensely | - |
| (verb) shine brightly and intensively | - |
| blazer | (noun) lightweight single-breasted jacket; often striped in the colors of a club or school | Synonyms: sport coat, sport jacket, sports coat, sports jacket |
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| blazing | (adjective) shining intensely | Synonyms: blinding, dazzling, fulgent, glaring, glary |
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| (adjective) without any attempt at concealment; completely obvious | Synonyms: blatant, conspicuous |
| (noun) a strong flame that burns brightly | Synonyms: blaze |
| blazon | (noun) the official symbols of a family, state, etc. | Synonyms: arms, blazonry, coat of arms |
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| (verb) decorate with heraldic arms | Synonyms: emblazon |
| blazonry | (noun) the official symbols of a family, state, etc. | Synonyms: arms, blazon, coat of arms |
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| bleach | (noun) the act of whitening something by bleaching it (exposing it to sunlight or using a chemical bleaching agent) | - |
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| (noun) the whiteness that results from removing the color from something | - |
| (noun) an agent that makes things white or colorless | Synonyms: blanching agent, bleaching agent, whitener |
| (verb) make whiter or lighter | - |
| (verb) cause to become white or lighter in color | Synonyms: bleach out, decolor, decolorise, decolorize, decolour, decolourise, decolourize, discolorise, discolorize, discolourise |
| bleached | (adjective) (used of color) artificially produced; not natural | Synonyms: colored, coloured, dyed |
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| (adjective) having lost freshness or brilliance of color | Synonyms: faded, washed-out, washy |
| bleacher | (noun) a worker who bleaches (cloth or flour etc.) | - |
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| bleachers | (noun) (used in the plural) an outdoor grandstand without a roof; patrons are exposed to the sun as linens are when they are bleached | - |
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| bleak | (adjective) unpleasantly cold and damp | Synonyms: cutting, raw |
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| (adjective) offering little or no hope | Synonyms: black, dim |
| (adjective) providing no shelter or sustenance | Synonyms: bare, barren, desolate, stark |
| bleakly | (adverb) without hope | - |
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| bleakness | (noun) a bleak and desolate atmosphere | Synonyms: bareness, desolation, nakedness |
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| blear | (adjective) tired to the point of exhaustion | Synonyms: blear-eyed, bleary-eyed, bleary |
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| (verb) make dim or indistinct | Synonyms: blur |
| bleary | (adjective) indistinct or hazy in outline | Synonyms: blurred, blurry, foggy, fuzzy, hazy, muzzy |
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| (adjective) tired to the point of exhaustion | Synonyms: blear-eyed, blear, bleary-eyed |
| bleat | (noun) the sound of sheep or goats (or any sound resembling this) | - |
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| (verb) cry plaintively | Synonyms: baa, blat, blate |
| (verb) talk whiningly | - |
| bleb | (noun) (pathology) an elevation of the skin filled with serous fluid | Synonyms: blister, bulla |
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| blebbed | (adjective) (of glass or quartzite) marred by small bubbles or small particles of foreign material | Synonyms: blebby |
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| blebby | (adjective) (of glass or quartzite) marred by small bubbles or small particles of foreign material | Synonyms: blebbed |
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| (adjective) covered with small blisters | Synonyms: blistery |
| bleed | (verb) lose blood from one's body | Synonyms: hemorrhage, shed blood |
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| (verb) draw blood | Synonyms: leech, phlebotomise, phlebotomize |
| (verb) drain of liquid or steam | - |
| (verb) be diffused | Synonyms: run |
| (verb) get or extort (money or other possessions) from someone | - |
| bleeder | (noun) someone who has hemophilia and is subject to uncontrollable bleeding | Synonyms: haemophile, haemophiliac, hemophile, hemophiliac |
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| bleeding | (noun) the flow of blood from a ruptured blood vessel | Synonyms: haemorrhage, hemorrhage |
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| bleep | (noun) a short high tone produced as a signal or warning | Synonyms: beep |
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| (verb) emit a single short high-pitched signal | - |
| blemish | (noun) a mark or flaw that spoils the appearance of something (especially on a person's body) | Synonyms: defect, mar |
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| (verb) add a flaw or blemish to; make imperfect or defective | Synonyms: flaw |
| (verb) mar or impair with a flaw | Synonyms: spot |
| (verb) mar or spoil the appearance of | Synonyms: deface, disfigure |
| blemished | (adjective) marred by imperfections | - |
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| (adjective) having a blemish or flaw | Synonyms: flawed |
| blench | (verb) turn pale, as if in fear | Synonyms: blanch, pale |
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| blend | (noun) the act of blending components together thoroughly | Synonyms: blending |
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| (noun) a new word formed by joining two others and combining their meanings | Synonyms: portmanteau, portmanteau word |
| (noun) an occurrence of thorough mixing | - |
| (verb) mix together different elements | Synonyms: coalesce, combine, commingle, conflate, flux, fuse, immix, meld, merge, mix |
| (verb) combine into one | Synonyms: immingle, intermingle, intermix |
| (verb) blend or harmonize | Synonyms: blend in, go |
| blende | (noun) an ore that is the chief source of zinc; consists largely of zinc sulfide in crystalline form | Synonyms: sphalerite, zinc blende |
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| blended | (adjective) combined or mixed together so that the constituent parts are indistinguishable | - |
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| blender | (noun) an electrically powered mixer with whirling blades that mix or chop or liquefy foods | Synonyms: liquidiser, liquidizer |
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| blending | (noun) a gradation involving small or imperceptible differences between grades | Synonyms: shading |
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| (noun) the act of blending components together thoroughly | Synonyms: blend |
| blennioid | (noun) elongated mostly scaleless marine fishes with large pectoral fins and reduced pelvic fins | Synonyms: blennioid fish |
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| blenny | (noun) small usually scaleless fishes with comb-like teeth living about rocky shores; are territorial and live in holes between rocks | Synonyms: combtooth blenny |
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| blepharism | (noun) condition in which a person blinks continuously | - |
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| blepharitis | (noun) inflammation of the eyelids characterized by redness and swelling and dried crusts | - |
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| blepharospasm | (noun) spasm of the eyelid muscle resulting in closure of the eye | - |
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| bless | (verb) give a benediction to | - |
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| (verb) render holy by means of religious rites | Synonyms: consecrate, hallow, sanctify |
| (verb) make the sign of the cross over someone in order to call on God for protection; consecrate | Synonyms: sign |
| (verb) confer prosperity or happiness on | - |
| blessed | (adjective) highly favored or fortunate (as e.g. by divine grace) | Synonyms: blest |
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| (adjective) characterized by happiness and good fortune | - |
| (adjective) enjoying the bliss of heaven | - |
| (adjective) expletives used informally as intensifiers | Synonyms: blame, blamed, blasted, damn, damned, darned, deuced, goddam, goddamn, goddamned, infernal |
| (adjective) Roman Catholic; proclaimed one of the blessed and thus worthy of veneration | Synonyms: beatified |
| blessedly | (adverb) in a blessed manner | - |
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| blessedness | (noun) a state of supreme happiness | Synonyms: beatification, beatitude |
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| blessing | (noun) the act of praying for divine protection | Synonyms: benediction |
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| (noun) the formal act of approving | Synonyms: approval, approving |
| (noun) a ceremonial prayer invoking divine protection | Synonyms: benediction |
| (noun) a short prayer of thanks before a meal | Synonyms: grace, thanksgiving |
| (noun) a desirable state | Synonyms: boon |
| blest | (adjective) highly favored or fortunate (as e.g. by divine grace) | Synonyms: blessed |
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| blether | (noun) idle or foolish and irrelevant talk | Synonyms: chin music, idle talk, prate, prattle |
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| (verb) to talk foolishly | Synonyms: babble, blather, blither, smatter |
| bletia | (noun) any of various orchids of the genus Bletia having pseudobulbs and erect leafless racemes of large purple or pink flowers | - |
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| bleu | (noun) cheese containing a blue mold | Synonyms: blue cheese |
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| blewits | (noun) edible agaric that is pale lilac when young; has a smooth moist cap | Synonyms: Clitocybe nuda |
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| blight | (noun) a state or condition being blighted | - |
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| (noun) any plant disease resulting in withering without rotting | - |
| (verb) cause to suffer a blight | Synonyms: plague |
| blighted | (adjective) affected by blight; anything that mars or prevents growth or prosperity | Synonyms: spoilt |
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| blighter | (noun) a persistently annoying person | Synonyms: cuss, gadfly, pest, pesterer |
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| (noun) a boy or man | Synonyms: bloke, chap, cuss, fella, feller, fellow, gent, lad |
| blimp | (noun) a small nonrigid airship used for observation or as a barrage balloon | Synonyms: sausage, sausage balloon |
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| blimpish | (adjective) pompously ultraconservative and nationalistic | - |
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| blind | (adjective) unable to see | Synonyms: unsighted |
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| (adjective) not based on reason or evidence | Synonyms: unreasoning |
| (adjective) unable or unwilling to perceive or understand | - |
| (noun) a protective covering that keeps things out or hinders sight | Synonyms: screen |
| (noun) a hiding place sometimes used by hunters (especially duck hunters) | - |
| (noun) something intended to misrepresent the true nature of an activity | Synonyms: subterfuge |
| (noun) people who have severe visual impairments, considered as a group | - |
| (verb) make dim by comparison or conceal | Synonyms: dim |
| (verb) make blind by putting the eyes out | - |
| (verb) render unable to see | - |
| blinded | (adjective) deprived of sight | - |
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| blinder | (noun) blind consisting of a leather eyepatch sewn to the side of the halter that prevents a horse from seeing something on either side | Synonyms: blinker, winker |
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| blindfold | (adjective) wearing a blindfold | Synonyms: blindfolded |
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| (noun) a cloth used to cover the eyes | - |
| (verb) cover the eyes of (someone) to prevent him from seeing | - |
| blindfolded | (adjective) wearing a blindfold | Synonyms: blindfold |
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| blinding | (adjective) shining intensely | Synonyms: blazing, dazzling, fulgent, glaring, glary |
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| blindly | (adverb) without seeing or looking | - |
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| (adverb) without preparation or reflection; without a rational basis | - |
| blindness | (noun) the state of being blind or lacking sight | Synonyms: cecity, sightlessness |
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| blindside | (verb) attack or hit on or from the side where the attacked person's view is obstructed | - |
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| (verb) catch unawares, especially with harmful consequences | - |
| blindworm | (noun) small burrowing legless European lizard with tiny eyes; popularly believed to be blind | Synonyms: Anguis fragilis, slowworm |
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| (noun) any of the small slender limbless burrowing wormlike amphibians of the order Gymnophiona; inhabit moist soil in tropical regions | Synonyms: caecilian |
| bling | (noun) flashy, ostentatious jewelry | Synonyms: bling bling |
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| blini | (noun) Russian pancake of buckwheat flour and yeast; usually served with caviar and sour cream | Synonyms: bliny |
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| blink | (noun) a reflex that closes and opens the eyes rapidly | Synonyms: blinking, eye blink, nictation, nictitation, wink, winking |
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| (verb) briefly shut the eyes | Synonyms: nictate, nictitate, wink |
| (verb) keep back by blinking | Synonyms: blink away, wink |
| (verb) gleam or glow intermittently | Synonyms: flash, twinkle, wink, winkle |
| blinker | (noun) a light that flashes on and off; used as a signal or to send messages | Synonyms: flasher |
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| (noun) blind consisting of a leather eyepatch sewn to the side of the halter that prevents a horse from seeing something on either side | Synonyms: blinder, winker |
| (noun) a blinking light on a motor vehicle that indicates the direction in which the vehicle is about to turn | Synonyms: trafficator, turn indicator, turn signal |
| (verb) put blinders on (a horse) | - |
| blinking | (adjective) closing the eyes intermittently and rapidly | Synonyms: winking |
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| (adjective) informal intensifiers | Synonyms: bally, bloody, blooming, crashing, flaming, fucking |
| (noun) a reflex that closes and opens the eyes rapidly | Synonyms: blink, eye blink, nictation, nictitation, wink, winking |
| blinks | (noun) small Indian lettuce of northern regions | Synonyms: blinking chickweed, Montia lamprosperma, water chickweed |
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| blintz | (noun) (Judaism) thin pancake folded around a filling and fried or baked | Synonyms: blintze |
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| blintze | (noun) (Judaism) thin pancake folded around a filling and fried or baked | Synonyms: blintz |
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| bliny | (noun) Russian pancake of buckwheat flour and yeast; usually served with caviar and sour cream | Synonyms: blini |
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| blip | (noun) a radar echo displayed so as to show the position of a reflecting surface | Synonyms: pip, radar target |
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| (noun) a sudden minor shock or meaningless interruption | - |
| bliss | (noun) a state of extreme happiness | Synonyms: blissfulness, cloud nine, seventh heaven, walking on air |
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| blissful | (adjective) completely happy and contented | - |
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| blissfully | (adverb) in a blissful manner | - |
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| blissfulness | (noun) a state of extreme happiness | Synonyms: bliss, cloud nine, seventh heaven, walking on air |
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| blister | (noun) (pathology) an elevation of the skin filled with serous fluid | Synonyms: bleb, bulla |
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| (noun) (botany) a swelling on a plant similar to that on the skin | - |
| (noun) a flaw on a surface resulting when an applied substance does not adhere (as an air bubble in a coat of paint) | - |
| (verb) get blistered | Synonyms: vesicate |
| (verb) cause blisters to form on | - |
| (verb) subject to harsh criticism | Synonyms: scald, scorch, whip |
| blistering | (adjective) very fast; capable of quick response and great speed | Synonyms: hot, red-hot |
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| (adjective) hot enough to raise (or as if to raise) blisters | Synonyms: blistery |
| (adjective) harsh or corrosive in tone | Synonyms: acerb, acerbic, acid, acrid, bitter, caustic, sulfurous, sulphurous, virulent, vitriolic |
| (noun) the formation of vesicles in or beneath the skin | Synonyms: vesication, vesiculation |
| blistery | (adjective) hot enough to raise (or as if to raise) blisters | Synonyms: blistering |
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| (adjective) covered with small blisters | Synonyms: blebby |
| blithe | (adjective) carefree and happy and lighthearted | Synonyms: blithesome, light-hearted, lighthearted, lightsome |
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| (adjective) lacking or showing a lack of due concern | - |
| blithely | (adverb) in a joyous manner | Synonyms: gayly, happily, jubilantly, merrily, mirthfully |
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| blitheness | (noun) a feeling of spontaneous good spirits | Synonyms: cheerfulness |
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| blither | (verb) to talk foolishly | Synonyms: babble, blather, blether, smatter |
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| blithesome | (adjective) carefree and happy and lighthearted | Synonyms: blithe, light-hearted, lighthearted, lightsome |
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| blitz | (noun) a swift and violent military offensive with intensive aerial bombardment | Synonyms: blitzkrieg |
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| (noun) (American football) defensive players try to break through the offensive line | Synonyms: linebacker blitzing, safety blitz |
| (verb) attack suddenly and without warning | - |
| blitzkrieg | (noun) a swift and violent military offensive with intensive aerial bombardment | Synonyms: blitz |
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| (verb) fight a quick and surprising war | - |
| blizzard | (noun) a series of unexpected and unpleasant occurrences | Synonyms: rash |
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| (noun) a storm with widespread snowfall accompanied by strong winds | Synonyms: snowstorm |
| bloat | (noun) swelling of the rumen or intestinal tract of domestic animals caused by excessive gas | - |
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| (verb) become bloated or swollen or puff up | - |
| (verb) make bloated or swollen | - |