con·sume

[kuhn-soom] verb, con·sumed, con·sum·ing.
verb (used with object)
1.
to destroy or expend by use; use up.
2.
to eat or drink up; devour.
3.
to destroy, as by decomposition or burning: Fire consumed the forest.
4.
to spend (money, time, etc.) wastefully.
5.
to absorb; engross: consumed with curiosity.
verb (used without object)
6.
to undergo destruction; waste away.
7.
to use or use up consumer goods.
00:10
Consume is a GRE word you need to know.
So is commemorate. Does it mean:
the quality of being complaisant.
honor the memory of

Origin:
1350–1400; Middle English (< Middle French consumer) < Latin consūmere, equivalent to con- con- + sūmere to take up (perhaps < *suzm- < *subzm- < *subs-(e)m-, equivalent to subs-, variant of sub- sub- + emere to take, buy)

half-con·sumed, adjective
o·ver·con·sume, verb, o·ver·con·sumed, o·ver·con·sum·ing.
pre·con·sume, verb (used with object), pre·con·sumed, pre·con·sum·ing.
un·con·sumed, adjective
un·der·con·sume, verb (used with object), un·der·con·sumed, un·der·con·sum·ing.


1. exhaust, deplete. 4. squander, dissipate.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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World English Dictionary
consume (kənˈsjuːm) [Click for IPA pronunciation guide]
 
vb
1.  (tr) to eat or drink
2.  (tr; often passive) to engross or obsess
3.  (tr) to use up; expend: my car consumes little oil
4.  to destroy or be destroyed by burning, decomposition, etc: fire consumed the forest
5.  (tr) to waste or squander: the time consumed on that project was excessive
6.  (passive) to waste away
 
[C14: from Latin consūmere to devour, from com- (intensive) + sūmere to take up, from emere to take, purchase]
 
con'suming
 
adj
 
con'sumingly
 
adv

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
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Etymonline
Word Origin & History

consume
late 14c., from L. consumere "to use up, eat, waste," from com- intensive prefix + sumere "to take," from sub- "under" + emere "to buy, take" (see exempt).
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Each of us, we're the neurons who consume and process them.
Developed countries consume the lion's share of fossil fuels.
They feed primarily on fish and mollusks, but will consume algae and other
  plant life and even other lobsters.
Also, you consume more oxygen when you are under stress than you do when you
  are calm.
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