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undies

[uhn-deez]
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plural noun
  1. women's or children's underwear.
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Origin of undies

First recorded in 1895–1900; und(erwear) + -ie + -s3
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for undy

undies

pl n
  1. informal women's underwear
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Word Origin and History for undy

undies

n.

1906, diminutive euphemistic abbreviation for women's underwear (or undergarments).

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Online Etymology Dictionary, © 2010 Douglas Harper