Strong's G2480 — ἰσχύω (verb)
ischuo (is-khoo'-o) v.
1. to have (or exercise) strength, force
{literally or figuratively}
[from G2479]
KJV: be able, avail, can do(-not), could, be good, might, prevail, be of strength, be whole, + much work 
Root(s): G2479 
Hebrew root: ἰσχύς
Occurrences: 28