In Islam, "halala" is a term that finds its roots in "halal" that translates to something that is permissible and therefore lawful. In the context of marriage, it means that a divorced woman can remarry her former husband only after she has married another man, consummated the marriage, and then divorced him. This practice is controversial and has been manipulated and misused in modern India. It is important to note that "halala" is not a requirement in Islam and is considered a sin by some.