G4866 — sunathleo
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
sunathleo — pronounced 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
2 occurrences in the KJV.
Philippians 1:27
Only let your conversation be as it becometh the gospel of Christ: that whether I come and see you, or else be absent, I may hear of your affairs, that ye stand fast in one spirit, with one mind striving together for the faith of the gospel;
Philippians 4:3
And I intreat thee also, true yokefellow, help those women which laboured with me in the gospel, with Clement also, and with other my fellowlabourers, whose names are in the book of life.