SYN: Fit, apposite, clever, meet, liable, becoming, appropriate, ready, fitting, suitable, pertinent, qualified, prompt, adapted, likely.
ANT: Unfitted, ill-timed, awkward, unlikely, inapt.
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KEY: Aptitude.
SYN: Fitness, liability, susceptibility, suitableness, readiness, quickness, cleverness, proneness, tendency.
ANT: Unfitness, unsuitableness, insusceptibility, slowness, stupidity, unreadiness, awkwardness.
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KEY: Arbiter.
SYN: Arbitrator, judge, umpire, moderator, director, referee, adjudicator.
ANT: Appellant, claimant, disputant, litigant.
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KEY: Arbitrary.
SYN: Tyrannical, harsh, dictatorial, imperious, bearing, overbearing, selfish, absolute, irresponsible, tyrannous, domineering, peremptory.
ANT: Mild, modest, lenient, considerate, obliging, limited, equitable, constitutional.
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KEY: Arbitrate.
SYN: Settle, adjust, compose, decide, determine, accommodate, adjudicate.
ANT: Dispute, claim, appeal, misdetermine, litigate, contend, misjudge.
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KEY: Archaic, [See ANCIENT].
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KEY: Architect.
SYN: Constructor, contriver, designer, builder, surveyor, agent.
ANT: Workman carrying out plans, destroyer, extinguisher.
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KEY: Ardent.
SYN: Longing, passionate, aspiring, warm, eager, fervent, excited, fiery, glowing, zealous, fervid, fierce, keen, vehement, hot, affectionate, impassioned, burning, heated.
ANT: Cool, cold, indifferent, dispassioned, apathetic, passionless, unimpassioned, phlegmatic, platonic.
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KEY: Ardor, [See ARDENT].
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KEY: Arduous.
SYN: Difficult, hard, lofty, onerous, laborious, steep, precipitous.
ANT: Easy, practicable, unlaborious, light, trivial.
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KEY: Argue.
SYN: Discuss, debate, prove, question, evidence, establish, imply, sift, dispute, persuade, controvert, contend, demonstrate, reason.
ANT: Dictate, assert, propound, command.
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KEY: Argument.
SYN: Reasoning, controversy, evidence, discussion, topic, dispute.
ANT: Assertion, assumption, without proof or evidence.
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KEY: Arid.
SYN: Dry, parched, sterile, unproductive.
ANT: Moist, dewy, watered, fertile, luxuriant, exuberant, verdant, blooming, productive.
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KEY: Aright.
SYN: Right, well, rightly, correctly, truly, properly, uprightly, unexceptionably, justly, suitably, appropriately.
ANT: Wrongly, awry, incorrectly, improperly, defectively, erroneously.