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unthink

[uhn-thingk] /ʌnˈθɪŋk/
verb (used without object), unthought, unthinking.
1.
to end one's thought or reverse the process of thought.
verb (used with object), unthought, unthinking.
2.
to dispel from the mind:
Unthink your thoughts.
Origin
1590-1600
1590-1600; un-2 + think1
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for un think

unthink

/ʌnˈθɪŋk/
verb (transitive) -thinks, -thinking, -thought
1.
to reverse one's opinion about
2.
to dispel from the mind
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
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