- desuetude (n.)
[desuetude 词源字典]
- 1620s, from Middle French désuétude (16c.), from Latin desuetudo "disuse," from desuetus, past participle of desuescere "become unaccustomed to," from de- "away, from" (see de-) + suescere "become used to" (see mansuetude).[desuetude etymology, desuetude origin, 英语词源]