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View synonyms for

why

[ wahy, hwahy ]

adverb

  1. for what? for what reason, cause, or purpose?:

    Why did you behave so badly?



conjunction

  1. for what cause or reason:

    I don't know why he is leaving.

  2. for which; on account of which (usually after reason to introduce a relative clause):

    the reason why he refused to go.

  3. the reason for which:

    That is why he returned.

noun

plural whys.
  1. a question concerning the cause or reason for which something is done, achieved, etc.:

    a child's unending hows and whys.

  2. the cause or reason:

    the whys and wherefores of a troublesome situation.

interjection

  1. (used as an expression of surprise, hesitation, etc., or sometimes a mere expletive):

    Why, it's all gone!

why

/ ɲɪ /

adverb

    1. for what reason, purpose, or cause?

      why are you here?

    2. ( used in indirect questions )

      tell me why you're here

“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

pronoun

  1. for or because of which

    there is no reason why he shouldn't come

“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

noun

  1. usually plural the reason, purpose, or cause of something (esp in the phrase the whys and wherefores )
“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

interjection

  1. an introductory expression of surprise, disagreement, indignation, etc

    why, don't be silly!

“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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Usage Note

See reason.
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Word History and Origins

Origin of why1

First recorded before 900; Middle English; Old English hwī, hwȳ, instrumental case of æ what; cognate with Old Norse ī
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Word History and Origins

Origin of why1

Old English ī; related to Old Norse ī, Gothic hveileiks what kind of, Latin ī
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Example Sentences

Examples have not been reviewed.

"He was close to the people," Elena said fondly, adding that she understood why he "couldn't stay away" from helping those worst off.

From

Goldstein dives into the culture shock of being plunged into the American comedy scene, visiting the White House, his love of musicals, and why his experience on “Sesame Street” changed his life forever.

From

“That’s why everybody hated him when he was at Duke. … For sure you remember how feisty he was,” James said.

From

It’s unclear exactly why children are staying for longer and why, but some researchers believe it is directly related to the administration’s stricter policy.

From

Though fence lizards don’t hibernate, they become sluggish in winter, which is why these days, warmed by the sun and driven by the urge to mate, they’re once more appearing all over.

From

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