| abracadabra | (noun) gibberish and nonsense | - |
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| abrachia | (noun) the condition of having no arms | - |
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| abradant | (noun) a tool or machine used for wearing down or smoothing or polishing | Synonyms: abrader |
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| (noun) a substance that abrades or wears down | Synonyms: abrasive, abrasive material |
| abrade | (verb) wear away | Synonyms: abrase, corrade, rub down, rub off |
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| (verb) rub hard or scrub | Synonyms: scour |
| abrader | (noun) a tool or machine used for wearing down or smoothing or polishing | Synonyms: abradant |
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| abranchial | (adjective) having no gills | Synonyms: abranchiate, abranchious, gill-less |
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| abranchiate | (adjective) having no gills | Synonyms: abranchial, abranchious, gill-less |
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| abranchious | (adjective) having no gills | Synonyms: abranchial, abranchiate, gill-less |
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| abrase | (verb) wear away | Synonyms: abrade, corrade, rub down, rub off |
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| abrasion | (noun) the wearing down of rock particles by friction due to water or wind or ice | Synonyms: attrition, detrition, grinding |
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| (noun) erosion by friction | Synonyms: attrition, corrasion, detrition |
| (noun) an abraded area where the skin is torn or worn off | Synonyms: excoriation, scrape, scratch |
| abrasive | (adjective) sharply disagreeable; rigorous | Synonyms: harsh |
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| (adjective) causing abrasion | Synonyms: scratchy |
| (noun) a substance that abrades or wears down | Synonyms: abradant, abrasive material |
| abrasiveness | (noun) the roughness of a substance that causes abrasions | Synonyms: harshness, scratchiness |
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| (noun) the quality of being sharply disagreeable | - |
| addlebrained | (adjective) stupid and confused | Synonyms: addlepated, muddleheaded, puddingheaded |
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| adumbrate | (verb) describe roughly or briefly or give the main points or summary of | Synonyms: outline, sketch |
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| (verb) give to understand | Synonyms: insinuate, intimate |
| adumbration | (noun) a sketchy or imperfect or faint representation | - |
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| (noun) the act of providing vague advance indications; representing beforehand | Synonyms: foreshadowing, prefiguration |
| adumbrative | (adjective) indistinctly prophetic | Synonyms: foreshadowing, prefigurative |
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| airbrake | (noun) a vehicular brake that operates by compressed air; especially for heavy vehicles | - |
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| (noun) a small parachute or articulated flap to reduce the speed of an aircraft | Synonyms: dive brake |
| algebra | (noun) the mathematics of generalized arithmetical operations | - |
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| algebraic | (adjective) of or relating to algebra | Synonyms: algebraical |
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| algebraical | (adjective) of or relating to algebra | Synonyms: algebraic |
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| algebraically | (adverb) in an algebraic manner | - |
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| algebraist | (noun) a mathematician whose specialty is algebra | - |
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| amphibrach | (noun) a metrical unit with unstressed-stressed-unstressed syllables (e.g., `remember') | - |
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| barmbrack | (noun) a rich currant cake or bun | - |
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| betweenbrain | (noun) the posterior division of the forebrain; connects the cerebral hemispheres with the mesencephalon | Synonyms: diencephalon, interbrain, thalmencephalon |
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| birdbrain | (noun) a person with confused ideas; incapable of serious thought | Synonyms: addle-head, addlehead, loon |
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| bra | (noun) an undergarment worn by women to support their breasts | Synonyms: bandeau, brassiere |
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| brabble | (verb) argue over petty things | Synonyms: bicker, niggle, pettifog, quibble, squabble |
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| brace | (noun) a structural member used to stiffen a framework | Synonyms: bracing |
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| (noun) a carpenter's tool having a crank handle for turning and a socket to hold a bit for boring | Synonyms: bitstock |
| (noun) an appliance that corrects dental irregularities | Synonyms: braces, orthodontic braces |
| (noun) a support that steadies or strengthens something else | - |
| (noun) elastic straps that hold trousers up | Synonyms: gallus, suspender |
| (noun) a rope on a square-rigged ship that is used to swing a yard about and secure it | - |
| (noun) either of two punctuation marks ({ or }) used to enclose textual material | - |
| (noun) a set of two similar things considered as a unit | Synonyms: pair |
| (noun) two items of the same kind | Synonyms: couple, couplet, distich, duad, duet, duo, dyad, pair, span, twain, twosome, yoke |
| (verb) cause to be alert and energetic | Synonyms: arouse, energise, energize, perk up, stimulate |
| (verb) support by bracing | - |
| (verb) support or hold steady and make steadfast, with or as if with a brace | Synonyms: stabilise, stabilize, steady |
| (verb) prepare (oneself), often but not necessarily for something unpleasant or difficult | Synonyms: poise |
| braced | (adjective) positioned so as to be ready for confrontation or danger | - |
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| (adjective) held up by braces or buttresses | Synonyms: buttressed |
| bracelet | (noun) jewelry worn around the wrist for decoration | Synonyms: bangle |
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| (noun) a band of cloth or leather or metal links attached to a wristwatch and wrapped around the wrist | Synonyms: watch bracelet, watchband, watchstrap, wristband |
| bracer | (noun) a tonic or restorative (especially a drink of liquor) | Synonyms: pick-me-up |
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| (noun) a protective covering for the wrist or arm that is used in archery and fencing and other sports | Synonyms: armguard |
| bracero | (noun) a Mexican laborer who worked in the United States on farms and railroads in order to ease labor shortages during World War II | - |
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| braces | (noun) an appliance that corrects dental irregularities | Synonyms: brace, orthodontic braces |
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| brachial | (adjective) of or relating to an arm | - |
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| brachiate | (adjective) having arms or armlike appendages | - |
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| (adjective) having widely spreading paired branches | - |
| (verb) swing from one hold to the next | - |
| brachiation | (noun) swinging by the arms from branch to branch | - |
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| brachiopod | (adjective) of or belonging to the phylum Brachiopoda | Synonyms: brachiopodous |
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| (noun) marine animal with bivalve shell having a pair of arms bearing tentacles for capturing food; found worldwide | Synonyms: lamp shell, lampshell |
| brachiopodous | (adjective) of or belonging to the phylum Brachiopoda | Synonyms: brachiopod |
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| brachistochrone | (noun) a curve between two points along which a body can move under gravity in a shorter time than for any other curve. | - |
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| brachium | (noun) (biology) a branching or armlike part of an animal | - |
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| brachycephalic | (adjective) having a short broad head with a cephalic index of over 80 | Synonyms: brachycranial, brachycranic |
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| (noun) an adult with a short broad head | - |
| brachycephalism | (noun) the quality of being brachycephalic | Synonyms: brachycephaly |
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| brachycephaly | (noun) the quality of being brachycephalic | Synonyms: brachycephalism |
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| brachycranial | (adjective) having a short broad head with a cephalic index of over 80 | Synonyms: brachycephalic, brachycranic |
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| brachycranic | (adjective) having a short broad head with a cephalic index of over 80 | Synonyms: brachycephalic, brachycranial |
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| brachydactylia | (noun) abnormal shortness of fingers and toes | Synonyms: brachydactyly |
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| brachydactylic | (adjective) having abnormally short finger or toes | Synonyms: brachydactylous |
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| brachydactylous | (adjective) having abnormally short finger or toes | Synonyms: brachydactylic |
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| brachydactyly | (noun) abnormal shortness of fingers and toes | Synonyms: brachydactylia |
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| brachypterous | (adjective) (especially of certain insects) having very short or rudimentary wings | Synonyms: short-winged |
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| brachyuran | (noun) typical crabs | - |
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| brachyurous | (adjective) of or belonging to the suborder Brachyura | - |
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| bracing | (adjective) imparting vitality and energy | Synonyms: brisk, fresh, refreshful, refreshing, tonic |
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| (noun) a structural member used to stiffen a framework | Synonyms: brace |
| bracken | (noun) large coarse fern often several feet high; essentially weed ferns; cosmopolitan | Synonyms: brake, pasture brake, Pteridium aquilinum |
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| (noun) fern of southeastern Asia; not hardy in cold temperate regions | Synonyms: Pteridium esculentum |
| bracket | (noun) a support projecting from a wall (as to hold a shelf) | Synonyms: wall bracket |
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| (noun) either of two punctuation marks ([ or ]) used to enclose textual material | Synonyms: square bracket |
| (noun) either of two punctuation marks (`<' or `>') used in computer programming and sometimes used to enclose textual material | Synonyms: angle bracket |
| (noun) a category falling within certain defined limits | - |
| (verb) classify or group | - |
| (verb) place into brackets | Synonyms: bracket out |
| (verb) support with brackets | - |
| brackish | (adjective) slightly salty (especially from containing a mixture of seawater and fresh water) | Synonyms: briny |
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| (adjective) distasteful and unpleasant; spoiled by mixture | - |
| brackishness | (noun) the quality of being salty, as the saltiness of water | - |
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| bract | (noun) a modified leaf or leaflike part just below and protecting an inflorescence | - |
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| bracteal | (adjective) pertaining to or resembling or functioning as a bract | - |
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| bracteate | (adjective) having bracts | Synonyms: bracted |
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| bracted | (adjective) having bracts | Synonyms: bracteate |
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| bracteolate | (adjective) having bracteoles | - |
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| bracteole | (noun) a small bract | Synonyms: bractlet |
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| bractlet | (noun) a small bract | Synonyms: bracteole |
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| brad | (noun) a small nail | - |
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| (verb) fasten with brads | - |
| bradawl | (noun) an awl for making small holes for brads or small screws | Synonyms: pricker |
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| bradycardia | (noun) abnormally slow heartbeat | - |
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| brae | (noun) a slope or hillside | - |
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| brag | (adjective) exceptionally good | Synonyms: boss |
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| (noun) an instance of boastful talk | Synonyms: bragging, crow, crowing, gasconade, line-shooting, vaporing |
| (verb) show off | Synonyms: blow, bluster, boast, gas, gasconade, shoot a line, swash, tout, vaunt |
| braggadocio | (noun) vain and empty boasting | Synonyms: bluster, rhodomontade, rodomontade |
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| braggart | (adjective) exhibiting self-importance | Synonyms: big, boastful, bragging, braggy, cock-a-hoop, crowing, self-aggrandising, self-aggrandizing |
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| (noun) a very boastful and talkative person | Synonyms: blowhard, boaster, bragger, line-shooter, vaunter |
| bragger | (noun) a very boastful and talkative person | Synonyms: blowhard, boaster, braggart, line-shooter, vaunter |
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| bragging | (adjective) exhibiting self-importance | Synonyms: big, boastful, braggart, braggy, cock-a-hoop, crowing, self-aggrandising, self-aggrandizing |
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| (noun) an instance of boastful talk | Synonyms: brag, crow, crowing, gasconade, line-shooting, vaporing |
| braggy | (adjective) exhibiting self-importance | Synonyms: big, boastful, braggart, bragging, cock-a-hoop, crowing, self-aggrandising, self-aggrandizing |
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| brahman | (noun) the highest of the four varnas: the priestly or sacerdotal category | Synonyms: brahmin |
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| (noun) a member of the highest of the four Hindu varnas | Synonyms: brahmin |
| (noun) a member of a social and cultural elite (especially a descendant of an old New England family) | Synonyms: brahmin |
| brahmin | (noun) the highest of the four varnas: the priestly or sacerdotal category | Synonyms: brahman |
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| (noun) a member of the highest of the four Hindu varnas | Synonyms: brahman |
| (noun) a member of a social and cultural elite (especially a descendant of an old New England family) | Synonyms: brahman |
| brahminic | (adjective) of or relating to or characteristic of a brahmin | Synonyms: brahminical |
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| brahminical | (adjective) of or relating to or characteristic of a brahmin | Synonyms: brahminic |
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| braid | (noun) trimming used to decorate clothes or curtains | Synonyms: braiding, gold braid |
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| (noun) a hairdo formed by braiding or twisting the hair | Synonyms: plait, tress, twist |
| (verb) form or weave into a braid or braids | Synonyms: pleach |
| (verb) decorate with braids or ribbons | - |
| (verb) make by braiding or interlacing | Synonyms: lace, plait |
| braided | (adjective) woven by (or as if by) braiding | - |
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| braiding | (noun) trimming used to decorate clothes or curtains | Synonyms: braid, gold braid |
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| brail | (noun) a small rope (one of several) used to draw a sail in | - |
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| (noun) a small net used to draw fish into a boat | - |
| (verb) haul fish aboard with brails | - |
| (verb) take in a sail with a brail | - |
| braille | (noun) a point system of writing in which patterns of raised dots represent letters and numerals | - |
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| (verb) transcribe in braille | - |
| brain | (noun) that part of the central nervous system that includes all the higher nervous centers; enclosed within the skull; continuous with the spinal cord | Synonyms: encephalon |
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| (noun) mental ability | Synonyms: brainpower, learning ability, mental capacity, mentality, wit |
| (noun) that which is responsible for one's thoughts, feelings, and conscious brain functions; the seat of the faculty of reason | Synonyms: head, mind, nous, psyche |
| (noun) the brain of certain animals used as meat | - |
| (noun) someone who has exceptional intellectual ability and originality | Synonyms: brainiac, Einstein, genius, mastermind |
| (verb) hit on the head | - |
| (verb) kill by smashing someone's skull | - |
| braincase | (noun) the part of the skull that encloses the brain | Synonyms: brainpan, cranium |
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| brainchild | (noun) a product of your creative thinking and work | Synonyms: inspiration |
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| brainiac | (noun) someone who has exceptional intellectual ability and originality | Synonyms: brain, Einstein, genius, mastermind |
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| brainish | (adjective) characterized by undue haste and lack of thought or deliberation | Synonyms: hotheaded, impetuous, impulsive, madcap, tearaway |
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| brainless | (adjective) not using intelligence | Synonyms: headless |
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| brainpan | (noun) the part of the skull that encloses the brain | Synonyms: braincase, cranium |
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| brainpower | (noun) mental ability | Synonyms: brain, learning ability, mental capacity, mentality, wit |
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| brainsick | (adjective) affected with madness or insanity | Synonyms: crazy, demented, disturbed, mad, sick, unbalanced, unhinged |
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| brainstem | (noun) the part of the brain continuous with the spinal cord and comprising the medulla oblongata and pons and midbrain and parts of the hypothalamus | Synonyms: brain-stem, brain stem |
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| brainstorm | (noun) the clear (and often sudden) understanding of a complex situation | Synonyms: brainwave, insight |
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| (verb) try to solve a problem by thinking intensely about it | - |
| brainstorming | (noun) a group problem-solving technique in which members spontaneously share ideas and solutions | - |
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| brainwash | (verb) submit to brainwashing; indoctrinate forcibly | - |
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| (verb) persuade completely, often through coercion | - |
| brainwashed | (adjective) subjected to intensive forced indoctrination resulting in the rejection of old beliefs and acceptance of new ones | - |
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| brainwashing | (noun) forcible indoctrination into a new set of attitudes and beliefs | - |
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| brainwave | (noun) the clear (and often sudden) understanding of a complex situation | Synonyms: brainstorm, insight |
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| (noun) (neurophysiology) rapid fluctuations of voltage between parts of the cerebral cortex that are detectable with an electroencephalograph | Synonyms: brain wave, cortical potential |