UBS Dictionary of the Greek New Testament

Sense 1: one who struggles along with, one who works arduously along with, fellow struggler

Semantic entry: 34.19

Semantic domains: Association

Subdomains: Associate

Definition: (a figurative extension of meaning of συστρατιώτης ‘fellow soldier,’ not occurring in the NT) one who serves in arduous tasks or undergoes severe experiences together with someone else

Notes: A strictly literal translation of συστρατιώτης in RV PHM 1:2 · LV PHM 1:2 · Read together PHM 1:2 might imply that Paul himself was a soldier and therefore, in a sense, a secret agent of some military force. Accordingly, it may be necessary to employ a simile, for example, ‘who works like a fellow soldier’ or ‘one who experiences great hardships along with us.’