Strong's G2478 — ἰσχυρός (adjective)
ischuros (is-khoo-ros') adj.
1. forcible
{literally or figuratively}
[from G2479]
KJV: boisterous, mighty(-ier), powerful, strong(-er, man), valiant 
Root(s): G2479 
Hebrew root: ἰσχύς
Occurrences: 29