But I keep under my body, and bring it into subjection: lest that by any means, when I have preached to others, I myself should be a castaway.
Noah Webster's 1828 Dictionary:
CASTAWAY, noun That which is thrown away. A person abandoned by God, as unworthy of his favor; a reprobate. 1 Corinthians 9:27.
CASTAWAY, adjective Rejected; useless; of no value.
For if ye live after the flesh, ye shall die: but if ye through the Spirit do mortify the deeds of the body, ye shall live.