His life, i.e. his soul, as the next clause explains it; or his appetite, which is a sign and an act of life. Bread, i.e. common and necessary food. Dainty meat; such as others do, and he formerly did, much desire and prize.
Related Commentaries of Job 33:20
Job 33:20
20 So that his life abhorreth bread, and his soul daintyf meat.