defunct
Word family noundefunctionadjectivedefunctdefunctive
de·funct /dɪˈfʌŋkt/ adjectiveadj formal USELESSnot existing anymore, or not useful anymore 不再存在的,不再使用的 the now-defunct nuclear reactor 现已废弃的核反应堆
Origin defunct (1500-1600) Latin defunctus, past participle of defungi “to finish, die”