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why

adverb
 
 
/waɪ/

Definition

A1 for what reason: "I'm going home." "Why?" Why did you choose to live in London? Why wait? Let's leave now. Why should I help him - he never helps me? Why is it that I find chocolate so addictive? The police asked me to explain why I hadn't reported the accident sooner. I don't know why she isn't here. Quite why he isn't here today is a mystery. There is no reason why we shouldn't succeed.Question words and expressions
(Definition of why adverb from the Cambridge Advanced Learner's Dictionary & Thesaurus © Cambridge University Press)

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