Onlooker

//ˈɒnˌlʊk.ə(ɹ)// noun

Definitions

Noun
  1. 1
    A spectator; someone looks on or watches, without becoming involved or participating.

    "I wasn’t involved in the fight; I was only an onlooker."

  2. 2
    someone who looks on wordnet

Etymology

From on + look + -er, probably from the verb look on, but compare with onlook.

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