Strong’s Greek
G5226 — hupeiko
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
ὑπείκω
hupeiko — pronounced hoop-i'-ko
from 5259 and eiko (to yield, be "weak"); to surrender:--submit self. see GREEK for 5259
1 occurrence in the KJV.
Hebrews 13:17
Obey them that have the rule over you, and submit yourselves: for they watch for your souls, as they that must give account, that they may do it with joy, and not with grief: for that is unprofitable for you.