alter ego

noun
🔊/ˌɔːltər ˈiːɡəʊ/
🔊/ˌɔːltər ˈiːɡəʊ/
(plural alter egos)
(from Latin)
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  1. a person whose personality is different from your own but who shows or acts as another side of your personality第二自我
    • Superman's alter ego was Clark Kent.超人的第二自我是克拉克 · 肯特。🔊🔊
  2. a close friend who is very like yourself至交;知己;挚友
  3. Word Originmid 16th cent.: Latin, ‘other self’.