genuine (adj.)

1590s, "natural, not acquired," from Latin genuinus "native, natural, innate," from root of gignere "to beget, produce" (from PIE root *gene- "give birth, beget"), 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.

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Definitions of genuine from WordNet

genuine (adj.)
not pretended; sincerely felt or expressed;
genuine emotion
Synonyms: true / unfeigned
genuine (adj.)
not fake or counterfeit;
a genuine Picasso
genuine leather
Synonyms: echt
genuine (adj.)
being or reflecting the essential or genuine character of something; "a literal solitude like a desert"- G.K.Chesterton;
a genuine dilemma
Synonyms: actual / literal / real