why on Earth

English

Pronunciation

• Audio (General Australian):

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Interjection

why on Earth?

1. (idiomatic) used to add emphasis to "why" when beginning a question.

   Why on Earth are you pouring vinegar in your drink?

Synonyms

• why in the world
• why the dickens (euphemistic)
• why in God's name (profane)
• why the Devil (mildly vulgar)
• why the fuck (vulgar, slang)