Is the wife entitled to demand the price of the gold she gifted to her husband and forgave him for, after more than seven months have passed since her forgiveness and seven years since her gift?

If a person forfeits a right willingly and while in full possession of their faculties, then it is not permissible to retract this right, according to the jurisprudential maxim: "That which has been relinquished does not return." Therefore, if your wife absolved you of her right and relinquished it by her own will, while she was of sound mind and mature judgment, then she has no right to demand it back. However, it is commendable for you to waive some of your right concerning her, out of honor and kindness towards her, and not as an obligation.