Strong's:εἴκω properly, to be weak, i.e. yieldDerivation: apparently a primary verb;KJV Usage: give place.
TBESG:εἴκωto yieldG:V εἴκω, [in LXX: 2Ki.12:7 (ענה), Refs Wis.18:25, 4Ma.1:6 * ;] to yield: Gal.2:5 (cf. ὑπ-είκω).† (AS)
εἴκω eikō i'-ko Apparently a primary verb; properly to be weak, that is, yieldKJV Usage: give place.
εἰκῆ eikē i-kay' Probably from G1502 (through the idea of failure); idly, that is, without reason (or effect)KJV Usage: without a cause, (in) vain (-ly.)
εἴκω eikō i'-ko Apparently a primary verb (perhaps akin to G1502 through the idea of faintness as a copy); to resembleKJV Usage: be like.
ὑπείκω hupeikō hoop-i'-ko From G5259 and G1502 εἴκω eikō (to yield, be “weak”); to surrenderKJV Usage: submit self.