Strong’s Greek
G4865 — sunagonizomai
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
συναγωνίζομαι
sunagonizomai — pronounced soon-ag-o-nid'-zom-ahee
from 4862 and 75; to struggle in company with, i.e. (figuratively) to be a partner (assistant):--strive together with. see GREEK for 4862 see GREEK for 75
1 occurrence in the KJV.
Romans 15:30
Now I beseech you, brethren, for the Lord Jesus Christ’s sake, and for the love of the Spirit, that ye strive together with me in your prayers to God for me;