imprescriptible
imprescriptible[ˌɪmprɪˈskrɪptɪb(ə)l]adjective- (Law)(of rights) unable to be taken away by prescription or by lapse of time
(律)(权利)不受法定期限约束的,不因时效消失的
语源- late 16th cent.: from medieval Latin imprescriptibilis, from in- 'not' + Latin praescript- (from praescribere 'prescribe')
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