- rook (1)
- "European crow," O.E. hroc, from P.Gmc. *khrokaz (cf. O.N. hrokr, M.Du. roec, M.Swed. roka, O.H.G. hruoh), possibly imitative of its raucous voice. Used as a disparaging term for persons since at least 1508, and extended by 1577 to mean "a cheat," especially at cards or dice. The verb "to defraud by cheating" (originally especially in a game) is first attested 1590. Rookery "colony of rooks" is from 1725.
- rook (2)
- "chess piece," c.1300, from O.Fr. roc, from Ar. rukhkh, from Pers. rukh, of unknown meaning, perhaps somehow related to the Indian name for the piece, rut, from Hindi rath "chariot." Confused in M.E. with roc (q.v.).