| accusive | (adjective) containing or expressing accusation | Synonyms: accusative, accusatory, accusing |
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| ace | (adjective) of the highest quality | Synonyms: A-one, crack, first-rate, super, tiptop, top-notch, topnotch, tops |
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| (noun) a serve that the receiver is unable to reach | - |
| (noun) one of four playing cards in a deck having a single pip on its face | - |
| (noun) someone who is dazzlingly skilled in any field | Synonyms: adept, champion, genius, hotshot, maven, mavin, sensation, star, superstar, virtuoso, whiz, whizz, wiz, wizard |
| (noun) the smallest whole number or a numeral representing this number | Synonyms: 1, I, one, single, unity |
| (verb) score an ace against | - |
| (verb) serve an ace against (someone) | - |
| (verb) play (a hole) in one stroke | - |
| (verb) succeed at easily | Synonyms: breeze through, nail, pass with flying colors, sail through, sweep through |
| acerate | (adjective) narrow and long and pointed; as pine leaves | Synonyms: acerose, acicular, needle-shaped |
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| acerbate | (verb) make sour or bitter | - |
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| (verb) cause to be bitter or resentful | Synonyms: embitter, envenom |
| acerose | (adjective) narrow and long and pointed; as pine leaves | Synonyms: acerate, acicular, needle-shaped |
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| acervate | (adjective) pertaining to a growth of fungi that forms a heaped-up mass | - |
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| acetaldehyde | (noun) a colorless volatile water-soluble liquid aldehyde used chiefly in the manufacture of acetic acid and perfumes and drugs | Synonyms: ethanal |
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| acetamide | (noun) a colorless solid amide of acetic acid used as a solvent and in the synthesis of organic compounds | Synonyms: ethanamide |
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| acetanilide | (noun) a solid odourless chemical of leaf or flake-like appearance; used in rubber accelerator, dye, and camphor synthesis; metabolised to paracetamol (acetaminophen) | Synonyms: acetanilid, phenylacetamide |
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| acetate | (noun) a fabric made from fibers of cellulose acetate | Synonyms: acetate rayon |
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| (noun) a salt or ester of acetic acid | Synonyms: ethanoate |
| acetone | (noun) the simplest ketone; a highly flammable liquid widely used as an organic solvent and as material for making plastics | Synonyms: dimethyl ketone, propanone |
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| acetose | (adjective) tasting or smelling like vinegar | Synonyms: acetous, vinegarish, vinegary |
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| acetylate | (verb) receive substitution of an acetyl group | Synonyms: acetylise, acetylize |
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| (verb) introduce an acetyl group into (a chemical compound) | Synonyms: acetylise, acetylize |
| acetylcholine | (noun) a neurotransmitter that is a derivative of choline; released at the ends of nerve fibers in the somatic and parasympathetic nervous systems | - |
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| acetylene | (noun) a colorless flammable gas used chiefly in welding and in organic synthesis | Synonyms: alkyne, ethyne |
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| acetylise | (verb) receive substitution of an acetyl group | Synonyms: acetylate, acetylize |
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| (verb) introduce an acetyl group into (a chemical compound) | Synonyms: acetylate, acetylize |
| acetylize | (verb) receive substitution of an acetyl group | Synonyms: acetylate, acetylise |
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| (verb) introduce an acetyl group into (a chemical compound) | Synonyms: acetylate, acetylise |
| ache | (noun) a dull persistent (usually moderately intense) pain | Synonyms: aching |
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| (verb) have a desire for something or someone who is not present | Synonyms: languish, pine, yearn, yen |
| (verb) be the source of pain | Synonyms: hurt, smart |
| (verb) feel physical pain | Synonyms: hurt, suffer |
| achene | (noun) small dry indehiscent fruit with the seed distinct from the fruit wall | - |
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| achievable | (adjective) capable of existing or taking place or proving true; possible to do | Synonyms: accomplishable, doable, manageable, realizable |
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| achieve | (verb) to gain with effort | Synonyms: accomplish, attain, reach |
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| achondrite | (noun) a stony meteor lacking chondrules | - |
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| achromatise | (verb) remove color from | Synonyms: achromatize |
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| achromatize | (verb) remove color from | Synonyms: achromatise |
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| aciculate | (adjective) related to plants or animals or crystals having aciculae or needlelike parts | - |
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| acidophile | (noun) an organism that thrives in a relatively acid environment | Synonyms: acidophil |
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| acidulate | (verb) make sour or more sour | Synonyms: acetify, acidify, sour |
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| acinose | (adjective) pertaining to one of the small sacs (as in a compound gland) | Synonyms: acinar, acinic, acinous |
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| ackee | (noun) red pear-shaped tropical fruit with poisonous seeds; flesh is poisonous when unripe or overripe | Synonyms: akee |
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| acknowledge | (verb) accept as legally binding and valid | - |
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| (verb) accept (someone) to be what is claimed or accept his power and authority | Synonyms: know, recognise, recognize |
| (verb) declare to be true or admit the existence or reality or truth of | Synonyms: admit |
| (verb) express obligation, thanks, or gratitude for | Synonyms: recognise, recognize |
| (verb) report the receipt of | Synonyms: receipt |
| (verb) express recognition of the presence or existence of, or acquaintance with | Synonyms: notice |
| acknowledgeable | (adjective) capable of being acknowledged | - |
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| acme | (noun) the highest point (of something) | Synonyms: apex, peak, vertex |
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| (noun) the highest level or degree attainable; the highest stage of development | Synonyms: elevation, height, meridian, peak, pinnacle, summit, superlative, tiptop, top |
| acne | (noun) an inflammatory disease involving the sebaceous glands of the skin; characterized by papules or pustules or comedones | - |
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| acolyte | (noun) someone who assists a priest or minister in a liturgical service; a cleric ordained in the highest of the minor orders in the Roman Catholic Church but not in the Anglican Church or the Eastern Orthodox Churches | - |
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| aconite | (noun) any of various usually poisonous plants of the genus Aconitum having tuberous roots and palmately lobed leaves and blue or white flowers | - |
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| acquaintance | (noun) personal knowledge or information about someone or something | Synonyms: conversance, conversancy, familiarity |
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| (noun) a person with whom you are acquainted | Synonyms: friend |
| (noun) a relationship less intimate than friendship | Synonyms: acquaintanceship |
| acquiesce | (verb) to agree or express agreement | Synonyms: accede, assent |
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| acquiescence | (noun) agreement with a statement or proposal to do something | Synonyms: assent |
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| (noun) acceptance without protest | - |
| acquirable | (adjective) capable of being acquired | - |
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| acquire | (verb) come to have or undergo a change of (physical features and attributes) | Synonyms: develop, get, grow, produce |
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| (verb) take on a certain form, attribute, or aspect | Synonyms: adopt, assume, take, take on |
| (verb) gain through experience | Synonyms: develop, evolve |
| (verb) gain knowledge or skills | Synonyms: larn, learn |
| (verb) come into the possession of something concrete or abstract | Synonyms: get |
| (verb) win something through one's efforts | Synonyms: gain, win |
| (verb) locate (a moving entity) by means of a tracking system such as radar | - |
| acquisitive | (adjective) eager to acquire and possess things especially material possessions or ideas | - |
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| acquittance | (noun) a legal document evidencing the discharge of a debt or obligation | Synonyms: release |
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| acre | (noun) a unit of area (4840 square yards) used in English-speaking countries | - |
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| acreage | (noun) an area of ground used for some particular purpose (such as building or farming) | Synonyms: land area |
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| acrosome | (noun) a process at the anterior end of a sperm cell that produces enzymes to facilitate penetration of the egg | - |
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| acrylamide | (noun) a white crystalline amide of propenoic acid can damage the nervous system and is carcinogenic in laboratory animals | - |
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| acrylate | (noun) a salt or ester of propenoic acid | Synonyms: propenoate |
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| acrylonitrile | (noun) a colorless liquid unsaturated nitrile made from propene | Synonyms: propenonitrile, vinyl cyanide |
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| actable | (adjective) capable of being acted; suitable for the stage | - |
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| actinide | (noun) any of a series of radioactive elements with atomic numbers 89 through 103 | Synonyms: actinoid, actinon |
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| actinolite | (noun) a green mineral of the amphibole group; calcium magnesium iron silicate | - |
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| actinomycete | (noun) any bacteria (some of which are pathogenic for humans and animals) belonging to the order Actinomycetales | - |
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| actionable | (adjective) affording grounds for legal action | - |
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| activate | (verb) make active or more active | - |
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| (verb) make (substances) radioactive | - |
| (verb) aerate (sewage) so as to favor the growth of organisms that decompose organic matter | Synonyms: aerate |
| (verb) make more adsorptive | - |
| (verb) put in motion or move to act | Synonyms: actuate, set off, spark, spark off, touch off, trigger, trigger off, trip |
| active | (adjective) (used of verbs (e.g. `to run') and participial adjectives (e.g. `running' in `running water')) expressing action rather than a state of being | Synonyms: dynamic |
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| (adjective) characterized by energetic activity | - |
| (adjective) tending to become more severe or wider in scope | - |
| (adjective) disposed to take action or effectuate change | - |
| (adjective) (of e.g. volcanoes) erupting or liable to erupt | - |
| (adjective) (of e.g. volcanoes) capable of erupting | - |
| (adjective) full of activity or engaged in continuous activity | - |
| (adjective) exerting influence or producing a change or effect | - |
| (adjective) engaged in full-time work | - |
| (adjective) expressing that the subject of the sentence has the semantic function of actor: | - |
| (adjective) (of the sun) characterized by an increased occurrence of sunspots and flares and radio emissions | - |
| (adjective) in operation | Synonyms: alive |
| (adjective) taking part in an activity | Synonyms: participating |
| (adjective) engaged in or ready for military or naval operations | Synonyms: combat-ready, fighting |
| (noun) a person who is a participating member of an organization | - |
| (noun) the voice used to indicate that the grammatical subject of the verb is performing the action or causing the happening denoted by the verb | Synonyms: active voice |
| (noun) chemical agent capable of activity | Synonyms: active agent |
| actualise | (verb) represent or describe realistically | Synonyms: actualize |
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| (verb) make real or concrete; give reality or substance to | Synonyms: actualize, realise, realize, substantiate |
| actualize | (verb) represent or describe realistically | Synonyms: actualise |
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| (verb) make real or concrete; give reality or substance to | Synonyms: actualise, realise, realize, substantiate |
| actuate | (verb) put in motion or move to act | Synonyms: activate, set off, spark, spark off, touch off, trigger, trigger off, trip |
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| (verb) give an incentive for action | Synonyms: incite, motivate, move, prompt, propel |
| acuate | (adjective) ending in a sharp point | Synonyms: acute, needlelike, sharp |
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| aculeate | (adjective) having or resembling a stinger or barb | Synonyms: aculeated |
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| acuminate | (adjective) (of a leaf shape) narrowing to a slender point | - |
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| (verb) make sharp or acute; taper; make (something) come to a point | - |
| acupressure | (noun) treatment of symptoms by applying pressure with the fingers to specific pressure points on the body | Synonyms: G-Jo, shiatsu |
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| acupuncture | (noun) treatment of pain or disease by inserting the tips of needles at specific points on the skin | Synonyms: stylostixis |
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| acute | (adjective) having or experiencing a rapid onset and short but severe course | - |
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| (adjective) of an angle; less than 90 degrees | - |
| (adjective) of critical importance and consequence | - |
| (adjective) having or demonstrating ability to recognize or draw fine distinctions | Synonyms: discriminating, incisive, keen, knifelike, penetrating, penetrative, piercing, sharp |
| (adjective) ending in a sharp point | Synonyms: acuate, needlelike, sharp |
| (adjective) extremely sharp or severe | Synonyms: intense |
| (noun) a mark placed above a vowel to indicate pronunciation | Synonyms: acute accent, ague |
| adage | (noun) a condensed but memorable saying embodying some important fact of experience that is taken as true by many people | Synonyms: byword, proverb, saw |
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| adamance | (noun) resoluteness by virtue of being unyielding and inflexible | Synonyms: obduracy, unyieldingness |
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| adamantine | (adjective) consisting of or having the hardness of adamant | - |
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| (adjective) having the hardness of a diamond | - |
| (adjective) impervious to pleas, persuasion, requests, reason | Synonyms: adamant, inexorable, intransigent |
| adaptable | (adjective) capable of adapting (of becoming or being made suitable) to a particular situation or use | - |
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| adaptative | (adjective) having a capacity for adaptation | Synonyms: adaptive |
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| adaptive | (adjective) having a capacity for adaptation | Synonyms: adaptative |
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| addable | (adjective) capable of being added or added to | Synonyms: addible |
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| addible | (adjective) capable of being added or added to | Synonyms: addable |
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| addictive | (adjective) causing or characterized by addiction | Synonyms: habit-forming |
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| additive | (adjective) characterized or produced by addition | - |
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| (adjective) designating or involving an equation whose terms are of the first degree | Synonyms: linear |
| (noun) something added to enhance food or gasoline or paint or medicine | - |
| addle | (verb) become rotten | - |
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| (verb) mix up or confuse | Synonyms: muddle, puddle |
| addressable | (adjective) capable of being addressed | - |
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| addressee | (noun) one to whom something is addressed | - |
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| adduce | (verb) advance evidence for | Synonyms: abduce, cite |
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| adductive | (adjective) especially of muscles; bringing together or drawing toward the midline of the body or toward an adjacent part | Synonyms: adducent, adducting |
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| ade | (noun) a sweetened beverage of diluted fruit juice | Synonyms: fruit drink |
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| adenine | (noun) (biochemistry) purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA | Synonyms: A |
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| adenosine | (noun) (biochemistry) a nucleoside that is a structural component of nucleic acids; it is present in all living cells in a combined form as a constituent of DNA and RNA and ADP and ATP and AMP | - |
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| adequate | (adjective) having the requisite qualities or resources to meet a task | Synonyms: equal |
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| (adjective) about average; acceptable | Synonyms: fair to middling, passable, tolerable |
| (adjective) sufficient for the purpose | Synonyms: enough |
| adesite | (noun) dark greyish extrusive rock | - |
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| adhere | (verb) follow through or carry out a plan without deviation | - |
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| (verb) stick to firmly | Synonyms: bind, bond, hold fast, stick, stick to |
| (verb) come or be in close contact with; stick or hold together and resist separation | Synonyms: cleave, cling, cohere, stick |
| (verb) be compatible or in accordance with | - |
| (verb) be loyal to | Synonyms: stand by, stick, stick by |
| (verb) be a devoted follower or supporter | Synonyms: stick |
| adherence | (noun) faithful support for a cause or political party or religion | Synonyms: adhesion, attachment |
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| (noun) the property of sticking together (as of glue and wood) or the joining of surfaces of different composition | Synonyms: adhesion, adhesiveness, bond |
| adhesive | (adjective) tending to adhere | - |
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| (noun) a substance that unites or bonds surfaces together | Synonyms: adhesive agent, adhesive material |
| adience | (noun) (psychology) an urge to accept or approach a situation or an object | - |
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| adipose | (adjective) composed of animal fat | - |
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| adjective | (adjective) relating to court practice and procedure as opposed to the principles of law | Synonyms: procedural |
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| (adjective) of or relating to or functioning as an adjective | Synonyms: adjectival |
| (noun) a word that expresses an attribute of something | - |
| (noun) the word class that qualifies nouns | - |
| adjudge | (verb) declare to be | Synonyms: declare, hold |
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| adjudicate | (verb) bring to an end; settle conclusively | Synonyms: decide, resolve, settle |
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| (verb) put on trial or hear a case and sit as the judge at the trial of | Synonyms: judge, try |
| adjudicative | (adjective) concerned with adjudicating | Synonyms: adjudicatory |
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| adjunctive | (adjective) joining; forming an adjunct | - |
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| adjure | (verb) command solemnly | - |
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| (verb) ask for or request earnestly | Synonyms: beseech, bid, conjure, entreat, press |
| adjustable | (adjective) capable of being changed so as to match or fit | - |
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| (adjective) capable of being regulated | - |
| adjustive | (adjective) conducive to adjustment | - |
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| admeasure | (verb) determine the quantity of someone's share | - |
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| administrable | (adjective) capable of being administered or managed | - |
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| administrate | (verb) work in an administrative capacity; supervise or be in charge of | Synonyms: administer |
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