en_tn/lev/18/19.md

to uncover her nakedness

To uncover someone's nakedness is an idiom that means to have sexual relations with them. See how you translated this idiom in Leviticus 18:6. (See: rc://en/ta/man/jit/figs-idiom)

the time of her uncleanness

This is the time every month when a woman bleeds from her womb.