phrase, idiomatic
to feel as if one has been separated from the outside world for ages; to feel like something is from another world; to feel that people and things have changed as if a lifetime has passed
Definitions (Kaifangcidian)
(沒有對應漢語詞彙)
Examples (粵典–words.hk)
Cantonese
恍如隔世
恍如隔世
time has passed and it's feel like it is another generation