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why not

why not

896 2.4
Say yes to an idea or suggestion because there is no good reason not to
  • idiom
translation icon : ¿por qué no?
  • I mean, it is my birthday, so why not go for it?
  • why not just
  • why not try
  • why not go

It's like, wow, why not just have some fun?

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Examples

  • If this diet might help her, why not try it?

  • So I figure why not try both?

  • If you have that concern, why not share it with the world?

  • It's like, wow, why not just have some fun?

  • Ask yourself, why not me or why not us?

  • And I thought why not open this whole wall up?

  • So I thought, why not show you what they look like?

  • So today I was like, why not do it with you?

  • So it's like, why not go for it?

  • If this diet might help her, why not try it?

Antonyms

716 1.7

To say no to a request or offer

272 3.4

To say no politely to an offer or invitation

How Willing

by all means
94 3.2
sure
  • Informal
1.0
why not
896 2.4
maybe
1.0

Surface Forms

why not main

Morphology

why + not

The phrase 'why not' literally combines 'why' (asking for a reason) with 'not' (negation) to mean 'for what reason not?', so a learner who knows both words can infer there is no good reason against the proposal and therefore accept or agree. Its rhetorical, invitational use is a direct pragmatic extension of those constituent meanings and is cross-linguistically common, so it should be immediately comprehensible to a B1 learner.

Etymology

Why not comes from the short question why not, asking 'is there any reason not to?'. If the answer is no, people say why not to show 'agreement' or 'willingness' to do something.