Artificial intelligent assistant

woa

woa, int.
  (wəʊ)
  Also woah.
  [Variant of whoa.]
  = wo int. 2. Hence woa v., to stop (trans. and intr.) with the call of ‘woa’.

1840 Dickens Old C. Shop xxxviii, Woa-a-a then, will you? 1856 Putnam's Monthly Mag. Nov. 530/1 With a loud ‘woah!’ the man stopped the beast [sc. ass]. 1870 S. Lanier Nine from eight 31, I woa'd my mules mighty easy. 1871 M. Legrand Cambr. Freshm. 252 Woa, Princey, woa! But Prince wouldn't ‘woa.’ 1892 Chevalier Wot Cher! iv, ‘Woa! steady! Neddy Woa!’

Oxford English Dictionary

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