FROM STRONG’S GREEK DICTIONARY (1890)

Strong’s Greek Dictionary (1890) — public domain, printed whole.

hupakouo ὑπακούω — hoop-ak-oo'-o — from 5259 and 191; to hear under (as a subordinate), i.e. to listen attentively; by implication, to heed or conform to a command or authority:--hearken, be obedient to, obey.

see GREEK for 5259

see GREEK for 191