Explanation:

Ila:
Besides talaaq, a Muslim husband can repudiate his marriage by two other modes, that are, Ila and Zihar. They are called constructive divorce. In Ila, the husband takes an oath not to have sexual intercourse with his wife. Followed by this oath, there is no consummation for a period of four months. After the expiry of the fourth month, the marriage dissolves irrevocably. But if the husband resumes cohabitation within four months, Ila is cancelled and the marriage does not dissolve