follow Dictionary.com

Your favorite word could be our Word of the Day!

unthinkable

[uhn-thing-kuh-buh l] /ʌnˈθɪŋ kə bəl/
adjective
1.
inconceivable; unimaginable:
the unthinkable size of the universe.
2.
not to be considered; out of the question:
Such a suggestion is unthinkable.
noun
3.
something that cannot be conceived or imagined, as something too unusual, vague, or disagreeable:
Today's unthinkables are tomorrow's realities.
Origin
late Middle English
1400-1450
1400-50; late Middle English; see un-1, thinkable
Related forms
unthinkability, unthinkableness, noun
unthinkably, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source
British Dictionary definitions for un-thinkably

unthinkable

/ʌnˈθɪŋkəbəl/
adjective
1.
not to be contemplated; out of the question
2.
unimaginable; inconceivable
3.
unreasonable; improbable
Derived Forms
unthinkability, unthinkableness, noun
unthinkably, adverb
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
Cite This Source
Word Origin and History for un-thinkably

unthinkable

adj.

early 15c., "too large to be conceived, unimaginable," from un- (1) "not" + thinkable (see think). Meaning "incapable of being framed by thought" is recorded from mid-15c.

Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source

Word of the Day

Difficulty index for unthinkable

Some English speakers likely know this word

Word Value for un

2
4
Scrabble Words With Friends

Quotes with un-thinkably

Nearby words for un-thinkably