dupe (dp, dyp)
A person who is easily deceived or is used to carry out the designs of another.
tr.v. duped, dup·ing, dupes
To deceive (an unwary person). See Synonyms at deceive.
[French, from Old French, probably alteration of huppe, hoopoe (from the bird's somewhat foolish appearance); see HOOPOE.]
The American Heritage® Dictionary of the English Language, Fifth Edition copyright ©2020 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:
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.