Artificial intelligent assistant

unfrost

unˈfrost, v.
  [un-2 4 b.]
  trans. To thaw.

1611 Florio, Disghiacciáre, to vnfrost, to thaw. 1853 Kane Grinnell Exp. xxxii. (1856) 275 We celebrated it by an extra dinner, a plum-cake unfrosted for the occasion.

Oxford English Dictionary

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