"falsest" in the adjective sense
1. false
not in accordance with the fact or reality or actuality
"gave false testimony under oath"
"false tales of bravery"
2. false, mistaken
arising from error
"a false assumption"
"a mistaken view of the situation"
3. false
erroneous and usually accidental
"a false start"
"a false alarm"
4. false
deliberately deceptive
"false pretenses"
5. delusive, false
inappropriate to reality or facts
"delusive faith in a wonder drug"
"delusive expectations"
"false hopes"
6. fake, false, faux, imitation, simulated
not genuine or real being an imitation of the genuine article it's real synthetic fur"
"it isn't fake anything
"faux pearls"
"false teeth"
"decorated with imitation palm leaves"
"a purse of simulated alligator hide"
7. false
designed to deceive
"a suitcase with a false bottom"
8. false, off-key, sour
inaccurate in pitch
"a false (or sour) note"
"her singing was off key"
9. assumed, false, fictitious, fictive, pretended, put on, sham
adopted in order to deceive
"an assumed name"
"an assumed cheerfulness"
"a fictitious address"
"fictive sympathy"
"a pretended interest"
"a put-on childish voice"
"sham modesty"
10. false, untrue
used especially of persons) not dependable in devotion or affection unfaithful
"a false friend"
"when lovers prove untrue"
Source: WordNet® (An amazing lexical database of English)
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