eternity
/ɪˈtɜ:nətɪ; ɪ`tənətɪ/ n
1 [U] (fml 文) time without end; state or time of life after death 永恒; 来世; 永生.
2 an eternity [sing]
(infml 口) a very long time that seems endless 漫长的时间
It seemed an eternity before the police arrived. 似乎等到猴年马月警察才来.