FROM STRONG’S GREEK DICTIONARY (1890)

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

ametanoetos ἀμετανόητος — am-et-an-o'-ay-tos — from 1 (as a negative particle) and a presumed derivative of 3340; unrepentant:--impenitent.

see GREEK for 1

see GREEK for 3340