de·bil·i·tate

[dih-bil-i-teyt]
verb (used with object), de·bil·i·tat·ed, de·bil·i·tat·ing.
to make weak or feeble; enfeeble: The siege of pneumonia debilitated her completely.

Origin:
1525–35; < Latin dēbilitātus (past participle of dēbilitāre), equivalent to dēbilit-, stem of dēbilis weak + -ātus -ate1

de·bil·i·tant, noun
de·bil·i·ta·tion, noun
de·bil·i·ta·tive, adjective
non·de·bil·i·tat·ing, adjective
non·de·bil·i·ta·tion, noun
non·de·bil·i·ta·tive, adjective
o·ver·de·bil·i·tate, verb (used with object), o·ver·de·bil·i·tat·ed, o·ver·de·bil·i·tat·ing.
un·de·bil·i·tat·ed, adjective
un·de·bil·i·tat·ing, adjective
un·de·bil·i·ta·tive, adjective


weaken, deplete, enervate, devitalize.
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Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
debilitate (dɪˈbɪlɪˌteɪt) [Click for IPA pronunciation guide]
 
vb
(tr) to make feeble; weaken
 
[C16: from Latin dēbilitāre, from dēbilis weak]
 
debili'tation
 
n

debilitating (dɪˈbɪlɪˌteɪtɪŋ) [Click for IPA pronunciation guide]
 
adj
tending to weaken or enfeeble

Collins English Dictionary - Complete & Unabridged 10th Edition
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Etymonline
Word Origin & History

debilitate
1530s, from L. debilitat-, pp. stem of debilitare "to weaken," from debilis "weak" (see debility). Related: Debilitated (1610s).

debilitating
1670s, pp. adj. from debilitate (q.v.).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

debilitating de·bil·i·tat·ing (dĭ-bĭl'ĭ-tā'tĭng)
adj.
Causing a loss of strength or energy.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
Knee injuries are by far the most common -- and the most debilitating --
  injuries in football.
Dan's form is unusual in that he has had several manic episodes but is spared
  the debilitating depressions that typically follow.
If its representative democracy functioned well, that might not be so
  debilitating.
It is nearly debilitating and she has had chronic problems with the nerves in
  her jaw due to it.
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