impersonal pronoun
noun /ɪmˌpɜːsənl ˈprəʊnaʊn/
/ɪmˌpɜːrsənl ˈprəʊnaʊn/
(grammar- a pronoun (in English, the pronoun ‘it’) that does not refer to a person or thing or to any other part of the sentence, for example in ‘it was raining’
非人称代词(如 it was raining 中的 it)