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See more synonyms for deathly on Thesaurus.com
  1. causing death; deadly; fatal.
  2. like death: a deathly silence.
  3. of, relating to, or indicating death; morbid: a deathly odor from the sepulcher.
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  1. in the manner of death.
  2. very; utterly: deathly afraid.
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Origin of deathly

before 1000; Middle English dethlich, Old English dēathlīc. See death, -ly
Related formsdeath·li·ness, nounpre·death·ly, adjective
Can be confuseddeadly deathly
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for deathly


  1. deadly
  2. resembling deatha deathly quiet
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Derived Formsdeathliness, noun
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 deathly


Old English deaþlic "mortal" (see death). Meaning "deadly" is from late 12c.; that of "death-like" is from 1560s.

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Online Etymology Dictionary, © 2010 Douglas Harper