Abbott-Smith Manual Greek Lexicon
γνήσιος (G1103)
4 ** γνήσιος , -α, -ον ( γίγνομαι ), [in LXX: Si 7:18 , III Mac 3:19 * ;] prop., lawfully begotten, born in wedlock (in π. , γυνὴ γ. , a lawful wife ; MM, s.v.). true, genuine, sincere : Phl 4:3 , I Ti 1:2 , Tit 1:4 ; as subst., τὸ γ. = ἡ γνησιότης , sincerity , II Co 8:8 .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain