pro·noun /ˈproˌnaʊn/
  代名詞
  Pro·noun n.  Gram. A word used instead of a noun or name, to avoid the repetition of it. The personal pronouns in English are I, thou or you, he, she, it, we, ye, and they.
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  pronoun
       n : a function word that is used in place of a noun or noun
           phrase