Why not
Example: Why not join us for dinner tonight?
Definition
"Why not" is an informal expression used to suggest or encourage someone to do something, often implying there is no good reason against it. For example, in the phrase "Why not join us for dinner tonight?" it invites participation or agreement in a friendly way.
Etymology
The phrase "why not" originates from the combination of the interrogative word 'why' and the negation 'not.' It has been used in English since at least the 16th century to challenge objections or propose possibilities. Did you know? It often functions as a rhetorical question inviting openness or agreement.
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"Why not" appears in the Vocaplus list "English - General - Idioms and Proverbs - (A1) - set 1", containing 104 commonly used expressions.
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