Abbott-Smith Manual Greek Lexicon
νήπιος (G3516)
15 νήπιος , -α, -ον , [in LXX chiefly for עוֹלֵל , also for פְּתִי , etc.;] infant ; of children and minors: Mt 21:16 (LXX) , I Co 13:11 , Ga 4:1 (v. Lft., in l.). Metaph., childish , unskilled , simple ( Ps 18 (19):8 , Pr 1:32 , al.): Mt 11:25 , Lk 10:21 , Ro 2:20 , Ga 4:3 , Eph 4:14 , I Th 2:7 (WH, fox ἤπιοι ); opp. to τέλειος , He 5:13 ; ν. ἐν Χριστῷ , I Co 3:1 .†
G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain