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adj. fals·er, fals·est
1. Contrary to fact or truth: false tales of bravery.
2. Deliberately untrue: delivered false testimony under oath.
3. Arising from mistaken ideas: false hopes of writing a successful novel.
4. Intentionally deceptive: a suitcase with a false bottom; false promises.
5. Not keeping faith; treacherous: a false friend. See Synonyms at faithless.
6. Not genuine or real: false teeth; false documents.
7. Erected temporarily, as for support during construction.
8. Resembling but not accurately or properly designated as such: a false thaw in January; the false dawn peculiar to the tropics.
9. Music Of incorrect pitch.
10. Unwise; imprudent: Don't make a false move or I'll shoot.
11. Computers Indicating one of two possible values taken by a variable in Boolean logic or a binary device.
In a treacherous or faithless manner: play a person false.

[Middle English fals, from Old English, counterfeit, and from Old French, false, both from Latin falsus, from past participle of fallere, to deceive.]

false′ly adv.
false′ness n.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
References in classic literature ?
The falser he, the truer Joe; the meaner he, the nobler Joe.
No notion could have been falser than this, for Rosamond's discontent in her marriage was due to the conditions of marriage itself, to its demand for self-suppression and tolerance, and not to the nature of her husband; but the easy conception of an unreal Better had a sentimental charm which diverted her ennui.
Mortimer, in spite of all the arts of the chemist, placidly refreshes himself with a glass of Madeira, and remains unconscious of the Document which engrosses the general attention, until Lady Tippins (who has a habit of waking totally insensible), having remembered where she is, and recovered a perception of surrounding objects, says: 'Falser man than Don Juan; why don't you take the note from the commendatore?' Upon which, the chemist advances it under the nose of Mortimer, who looks round at him, and says:
Speaking of dining, all four restaurants offer a la carte dining (courtesy of the Michelin-starred chef Theodor Falser) with dishes specially crafted for two.
Michael Falser and Monica Juneja (New York: Springer, 2012), pp.
If the threshold is reduced, there will be less false mismatches, but falser accept.