LSJ Gloss:δυνατέωto be powerful, mightyDodson:δυνατέωI am powerful, ableI am powerful, have power, am able, am mighty.
TBESG:δυνατέωbe ableG:V δυνατέω, -ῶ (< δυνατός), to be able, be powerful, mighty: with inf., Refs Rom.14:4, 2Co.9:8; absol., opp. to ἀσθενῶ 2Co.13:3.† (AS)
δυνατός dunatos doo-nat-os' From G1410; powerful or capable (literally or figuratively); neuter possibleKJV Usage: able, could, (that is) mighty (man), possible, power, strong.
ἀδύνατος adunatos ad-oo'-nat-os From G1 (as a negative particle) and G1415; unable, that is, weak (literally or figuratively); passively impossibleKJV Usage: could not do, impossible, impotent, not possible, weak.