en_tn/lev/15/01.md

comes out of his body

This refers to the man's private parts. (See: rc://en/ta/man/translate/figs-euphemism)

he becomes unclean

The person whom other people may not touch is spoken of as if he were physically unclean. (See: rc://en/ta/man/translate/figs-metaphor)

it is unclean

"his body is unclean" or "he is unclean"