2 Timothy 2:3 tells Timothy to join in suffering like a good what of Christ Jesus?

Answer: Soldier

"Join me in suffering, like a good soldier of Christ Jesus." A soldier avoids civilian affairs to please the one who enlisted him.

“Join me in suffering, like a good soldier of Christ Jesus. A soldier refrains from entangling himself in civilian affairs, in order to please the one who enlisted him.”— 2 Timothy 2:3-4 (BSB)