He is to purify himself on the third day and he will be clean on the seventh day. But if he can't purify himself on the third day then he can't be clean on the seventh day.

The clean person is to sprinkle the unclean person on the third day and seventh day and then he is to purify himself on the seventh day, wash his clothes, and bathe with water. He is to be considered clean at evening.

But if her husband remains silent about her from day to day, then he has affirmed all her vows or obligations that she has obligated herself to fulfill. He has affirmed them because he remained silent from the day he heard her vows.