FROM STRONG’S GREEK DICTIONARY (1890)

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

epischo ἐπισχύω — ep-is-khoo'-o — from 1909 and 2480; to avail further, i.e. (figuratively) insist stoutly:--be the more fierce.

see GREEK for 1909

see GREEK for 2480