Strong's G1502 · Greek

εἴκω

eiko · i'-ko

apparently a primary verb; properly, to be weak, i.e. yield

Scholarly Lexicons

Abbott-Smith Manual Greek Lexicon

 1 εἴκω , [in LXX: II Ki 12:7 ( ענה ), Wi 18:25 , IV Mac 1:6 * ;] to yield : Ga 2:5 (cf. ὑπ-είκω ).† 

G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain