Artificial intelligent assistant

impurpure

impurpure, v. Sc. Obs.
  Also 7 em-.
  [f. im-1 + purpure, earlier form of purple.]
  trans. To make purple; to empurple.

1552 Lyndesay Monarche Prol. 146 Quhose donke impurpurit vestiment nocturnall, With his imbroudit mantyll matutyne. 1628 Sir W. Mure Spir. Hymne 114 Empurp'ring thy vnstained face.

Oxford English Dictionary

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