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doubly

[duhb-lee]
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adverb
  1. to a double measure or degree: to be doubly cautious.
  2. in a double manner.
  3. Obsolete. with duplicity.
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Origin of doubly

Middle English word dating back to 1350–1400; see origin at double, -ly
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for doubly

doubly

adverb
  1. to or in a double degree, quantity, or measuredoubly careful
  2. in two waysdoubly wrong
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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 doubly

adv.

late 14c., from double (adj.) + -ly (2).

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Online Etymology Dictionary, © 2010 Douglas Harper