ungenuine

adjective

1. possessing the claimed or attributed character, quality, or origin; not counterfeit; authentic; real: genuine sympathy; a genuine antique.
2. properly so called: a genuine case of smallpox.
3. free from pretense, affectation, or hypocrisy; sincere: a genuine person.
4. descended from the original stock; pure in breed: a genuine Celtic people.

adjective

1. not fake or counterfeit; original; real; authentic
2. not pretending; frank; sincere
3. being of authentic or original stock

adj.1590s, “natural, not acquired,” from Latin genuinus “native, natural,” from root of gignere “beget” (see genus), perhaps influenced in form by contrasting adulterinus “spurious.” [Alternative etymology is from Latin genu “knee,” from a supposed ancient custom of a father acknowledging paternity of a newborn by placing it on his knee.] Meaning “really proceeding from its reputed source” is from 1660s. Related: Genuinely; genuineness.