desuetude
/dɪˈsjuːɪtjuːd/noun
mass noun
- formal a state of disuse〈正式〉废弃, 不用：
the docks fell into desuetude.
这些码头已废弃不用了。
词源
early 17th cent. (in the sense cessation)： from French， from Latin desuetudo, from desuet- 'made unaccustomed'， from the verb desuescere, from de- (expressing reversal) + suescere 'be accustomed'.