FROM STRONG’S GREEK DICTIONARY (1890)

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

sunathleo συναθλέω — soon-ath-leh'-o — from 4862 and 118; to wrestle in company with, i.e. (figuratively) to seek jointly:--labour with, strive together for.

see GREEK for 4862

see GREEK for 118