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rook 1 (rk)
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n.
1. A Eurasian corvid (Corvus frugilegus) having black plumage with a patch of bare skin around the base of the bill, and nesting in colonies near the tops of trees.
2. A swindler or cheat, especially at games.
tr.v. rooked, rook·ing, rooks
To swindle; cheat: Customers are afraid of being rooked by unscrupulous vendors.

[Middle English rok, from Old English hrōc.]

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
 
rook 2 (rk)
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n. Abbr. R
A chess piece that may move in a straight line over any number of empty squares in a rank or file. Also called castle.

[Middle English, from Old French roc, from Arabic ruḫḫ, from Persian ruḫ, from Middle Persian rox, ultimately from Middle Indic rahu, raho, nominative of raha- raha-, chariot, from Prakrit ratha-, from Sanskrit rathaḥ (the original form of the rook in the early chess of India being a chariot); see ret- in the Appendix of Indo-European roots.]

The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2018 by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
 

Indo-European & Semitic Roots Appendices

    Thousands of entries in the dictionary include etymologies that trace their origins back to reconstructed proto-languages. You can obtain more information about these forms in our online appendices:

    Indo-European Roots

    Semitic Roots

    The Indo-European appendix covers nearly half of the Indo-European roots that have left their mark on English words. A more complete treatment of Indo-European roots and the English words derived from them is available in our Dictionary of Indo-European Roots.

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