verb (used with object), consumed, consuming.
to destroy or expend by use; use up.
to eat or drink up; devour.
to destroy, as by decomposition or burning: Fire consumed the forest.
to spend (money, time, etc.) wastefully.
to absorb; engross: consumed with curiosity.
verb (used without object), consumed, consuming.
to undergo destruction; waste away.
to use or use up consumer goods.

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-consumed, adjective
overconsume, verb, overconsumed, overconsuming.
preconsume, verb (used with object), preconsumed, preconsuming.
unconsumed, adjective
underconsume, verb (used with object), underconsumed, underconsuming.

1. exhaust, deplete. 4. squander, dissipate. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To consume
World English Dictionary
consume (kənˈsjuːm)
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]

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
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Word Origin & History

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
There was a six-month supply of food and water-but not a soul to consume it.
Where spotted owls are finicky eaters, barred owls consume almost anything,
  including spotted owls.
Readers consume volumes of it, and then ask to meet the author.
It took him nearly the duration of the flight to consume half his bagel: he had
  a lot to say.
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