FROM STRONG’S GREEK DICTIONARY (1890)

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

dunamis δύναμις — doo'-nam-is — from 1410; force (literally or figuratively); specially, miraculous power (usually by implication, a miracle itself):--ability, abundance, meaning, might(-ily, -y, -y deed), (worker of) miracle(-s), power, strength, violence, mighty (wonderful) work.

see GREEK for 1410