false

Untrue, not factual, factually incorrect.

Based on factually incorrect premises.

Spurious, artificial.

Uttering falsehood; dishonest or deceitful.

Not faithful or loyal, as to obligations, allegiance, vows, etc.; untrue; treacherous.

Not well founded; not firm or trustworthy; erroneous.

Not essential or permanent, as parts of a structure which are temporary or supplemental.

Used in the vernacular name of a species (or group of species) together with the name of another species to which it is similar in appearance.

(music) Out of tune.