verb (used with object), dispelled, dispelling.
to drive off in various directions; disperse; dissipate: to dispel the dense fog.
to cause to vanish; alleviate: to dispel her fears.

1625–35; < Latin dispellere to drive asunder, equivalent to dis- dis-1 + pellere to drive

dispellable, adjective
dispeller, noun
undispellable, adjective
undispelled, adjective

1, 2. See scatter.

1. gather.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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World English Dictionary
dispel (dɪˈspɛl)
vb , -pels, -pelling, -pelled
(tr) to disperse or drive away
[C17: from Latin dispellere, from dis-1 + pellere to drive]

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

1630s, from L. dispellere "drive apart," from dis- "away" + pellere "to drive, push." Since the meaning is "to drive away in different directions" it should not have as an object a single, indivisible thing (you can dispel suspicion, but not an accusation). Related: Dispelled; dispelling.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
Nor, in all honesty, did they do much to dispel that belief.
Facts are only useful if they can inform broader concepts and help dispel myths.
And the cautious nature of science is unlikely to be able to dispel belief in
  the link any time soon.
In this column, we will do our best to set the record straight and dispel
  popular myths about this condition.
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