could not do, impossible, impotent, not possible, weak

Strong’s Dictionary of Greek Words:

Greek:
ἀδύνατος
Transliteration:
adunatos
Phonic:
ad-oo’-nat-os
Meaning:
from 1 (as a negative particle) and 1415; unable, i.e. weak (literally or figuratively); passively, impossible
KJV Usage:
could not do, impossible, impotent, not possible, weak