Mansuetude was first used in English in the 14th century, and it derives from the Latin verb mansuescere, which means "to tame." Mansuescere itself comes from the noun manus (meaning "hand") and the verb suescere ("to accustom" or "to become accustomed"). Unlike manus, which has many English descendants (including manner,emancipate, and manicure, among others), suescere has only a few English progeny. One of them is a word we featured in December - desuetude - which means "disuse" and comes to us by way of Latin desuescere ("to become unaccustomed"). Two others are custom and accustom, which derive via Anglo-French from Latin consuescere, meaning "to accustom."