| adulterant | (adjective) making impure or corrupt by adding extraneous materials | Synonyms: adulterating |
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| adulterate | (adjective) mixed with impurities | Synonyms: adulterated, debased |
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| adulterated | (adjective) mixed with impurities | Synonyms: adulterate, debased |
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| adulterating | (adjective) making impure or corrupt by adding extraneous materials | Synonyms: adulterant |
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| adulterine | (adjective) conceived in adultery | - |
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| adulterous | (adjective) characterized by adultery | Synonyms: extracurricular, extramarital |
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| (adjective) not faithful to a spouse or lover | Synonyms: cheating, two-timing |
| alterable | (adjective) capable of being changed or altered in some characteristic | - |
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| (adjective) (of the punishment ordered by a court) capable of being changed to one less severe | - |
| alterative | (adjective) tending to cure or restore to health | Synonyms: curative, healing, remedial, sanative, therapeutic |
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| altered | (adjective) changed in form or character without becoming something else | - |
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| (adjective) having testicles or ovaries removed | Synonyms: neutered |
| (adjective) changed in order to improve or made more fit for a particular purpose | Synonyms: adapted |
| alternate | (adjective) of leaves and branches etc; first on one side and then on the other in two ranks along an axis; not paired | - |
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| (adjective) serving or used in place of another | Synonyms: alternative, substitute |
| (adjective) occurring by turns; first one and then the other | Synonyms: alternating |
| (adjective) every second one of a series | - |
| alternating | (adjective) (of a current) reversing direction | - |
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| (adjective) occurring by turns; first one and then the other | Synonyms: alternate |
| alternative | (adjective) necessitating a choice between mutually exclusive possibilities | - |
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| (adjective) serving or used in place of another | Synonyms: alternate, substitute |
| (adjective) pertaining to unconventional choices | - |
| faltering | (adjective) unsteady in speech or action | - |
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| inalterable | (adjective) not capable of being changed or altered | Synonyms: unalterable |
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| sheltered | (adjective) protected from danger or bad weather | - |
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| subaltern | (adjective) inferior in rank or status | Synonyms: junior-grade, lower-ranking, lowly, petty, secondary |
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| sweltering | (adjective) excessively hot and humid or marked by sweating and faintness | Synonyms: sweltry |
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| ulterior | (adjective) lying beyond what is openly revealed or avowed (especially being kept in the background or deliberately concealed) | Synonyms: subterranean, subterraneous |
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| (adjective) beyond or outside an area of immediate interest; remote | - |
| (adjective) coming at a subsequent time or stage | Synonyms: later, posterior |
| unadulterated | (adjective) not mixed with impurities | - |
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| (adjective) without qualification; used informally as (often pejorative) intensifiers | Synonyms: arrant, complete, consummate, double-dyed, everlasting, gross, perfect, pure, sodding, staring, stark, thorough, thoroughgoing, utter |
| unalterable | (adjective) not capable of being changed or altered | Synonyms: inalterable |
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| (adjective) of a sentence; that cannot be changed | - |
| (adjective) remaining the same for indefinitely long times | Synonyms: changeless |
| unaltered | (adjective) remaining in an original state | Synonyms: unchanged |
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| unfaltering | (adjective) marked by firm determination or resolution; not shakable | Synonyms: firm, steadfast, steady, stiff, unbendable, unshakable, unwavering |
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