a common Old World bird with black plumage, similar to the related carrion crow but having a bare grey face: Corvus frugilegus
[Old English hrōc]
rook2verb trans
informal to defraud, (somebody) by cheat, or overchargeing them
[rook1 in the archaic senses ‘cheat, swindler’]
rook3noun
in chess, either of two pieces of each colour that can have the power to move straight along the ranks or files across any number of consecutive unoccupied squares; = castle1 (3)
[Middle English rok via French from Arabic rukhkh, from Persian]