Cornute /(k?r"n?t [or] k?r-n?t")/

Cor·nute

Cornute

a.
  1. Bearing horns; horned; horn-shaped.
  2. Cuckolded. [R.]

Cornute

v. t.
  1. To bestow horns upon; to make a cuckold of; to cuckold. [Obs.]