Why definition: For what purpose, reason, or cause; with what intention, justification, or motive.

an introductory expression of surprise, disagreement, indignation, etc: why, don't be silly! Etymology: Old English hwΔ«; related to Old Norse hvΔ«, Gothic hveileiks what kind of, Latin quΔ«

Lady Constance was in high spirits, and why not? Whether you’re a teacher or a learner, Vocabulary.com can put you or your class on the path to systematic vocabulary improvement.

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You use why in questions when you ask about the reasons for something. Why hasn't he brought the bill? Why didn't he stop me? Why can't I remember the exact year we married?

When we ask for reasons in speaking, we can use the phrase why is that? In informal conversations we often say why’s that?: …

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