Extended Strong's Greek Lexicon (Abbott-Smith based)
to harm
Usage: κακόω, -ῶ (κακός), [in LXX chiefly for רָעַע hi., עָנָה pi. ;] __1. to ill-treat, afflict, distress: with accusative of person(s), Act.7:6, 19 12:1 18:10, 1Pe.3:13. __2. (not in cl.), to embitter (Psa.106:32): Act.14:2,† (AS)