| false | (adjective) not in accordance with the fact or reality or actuality | - |
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| (adjective) not genuine or real; being an imitation of the genuine article | Synonyms: fake, faux, imitation, simulated |
| (adjective) adopted in order to deceive | Synonyms: assumed, fictitious, fictive, pretended, put on, sham |
| (adjective) designed to deceive | - |
| (adjective) (used especially of persons) not dependable in devotion or affection; unfaithful | Synonyms: untrue |
| (adjective) arising from error | Synonyms: mistaken |
| (adjective) inaccurate in pitch | Synonyms: off-key, sour |
| (adjective) deliberately deceptive | - |
| (adjective) erroneous and usually accidental | - |
| (adjective) inappropriate to reality or facts | Synonyms: delusive |
| falsetto | (adjective) artificially high; above the normal voice range | - |
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| falsifiable | (adjective) capable of being tested (verified or falsified) by experiment or observation | Synonyms: confirmable, verifiable |
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