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deafen

[def-uh n]
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verb (used with object)
  1. to make deaf: The accident deafened him for life.
  2. to stun or overwhelm with noise: The pounding of the machines deafened us.
  3. deaden(def 3).
  4. Obsolete. to render (a sound) inaudible, especially by a louder sound.
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Origin of deafen

First recorded in 1590–1600; deaf + -en1
Related formsdeaf·en·ing·ly, adverbhalf-deaf·ened, adjectivenon·deaf·ened, adjective
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for deafeningly

deafen

verb
  1. (tr) to make deaf, esp momentarily, as by a loud noise
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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 deafeningly

deafen

v.

1590s, "to make deaf," from deaf + -en (1). The earlier verb was simply deaf (mid-15c.). For "to become deaf, to grow deaf," Old English had adeafian (intransitive), which survived into Middle English as deave but then took on a transitive sense from mid-14c. and sank from use except in dialects (where it mostly has transitive and figurative senses), leaving English without an intransitive verb here.

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Online Etymology Dictionary, © 2010 Douglas Harper

deafeningly in Medicine

deafen

(dĕfən)
v.
  1. To make deaf, especially momentarily by a loud noise.
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The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.