Artificial intelligent assistant

onlooker

onlooker
  (ˈɒnˌlʊkə(r))
  [f. on-1 4 + looker n.]
  One who looks on; a looker on; a spectator.

1606 Drummond of Hawthornden Let. fr. Greenwich Wks. (1711) 232 Who..will not be an idle on-looker to such pastimes. 1615 Daniel Hymen's Tri. Wks. (1717) 94 We robb'd our Looks th' Onlookers to beguile. 1833 J. Rennie Alph. Angling p. xiv, So far as an on-looker and a child could learn. 1884 Macm. Mag. Nov. 1/1 It is the onlooker that sees most of the game.

Oxford English Dictionary

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