keep under. Greek. hupopiazo. See Luke 18:5.
bring... into subjection. reduce to slavery. Greek. doulagogeo. Only here. Compare App-190.
lest that by any means. Greek. mepos.
when, &c. = having preached. Greek. kerusso. App-121. There is an appropriateness in using here this verb, "to act as. herald". The herald summons the competitors.
be. become, or prove to be.
a castaway. disapproved, or rejected (for the prize). Greek. adokimos. See Romans 1:28.