Originally, to work raw material, to form: hence, to practise, exercise, discipline; and so, in ecclesiastical language, to mortify the body. Of the kindred adjective ἀσκητικός our word ascetic is a transcript.
Void of offence (ἀπτόσκοπον)
Lit., without stumbling; unshaken. The word is used thus in a passive sense here, as in Phi 1:10. In 1Co 10:32, it occurs in the active sense of giving offence to others, or causing them to stumble.