why not

adverb

Why is that so? (for a negative statement)

“I don't want to go out today. — Why not?”

Similar

Meanings

adverbwhy not (not comparable)
  1. not comparableWhy is that so? (for a negative statement)

    I don't want to go out today. — Why not?

    Synonyms: why?, how come?

  2. not comparablerhetoricalUsed to state that one has no objection to and approves of a proposal.

    Let's have pizza for lunch. — Yeah, why not?

    Synonyms: all right, OK

  3. not comparablerhetoricalUsed to introduce a proposal.

    Why not try turning the handle in the other direction to see if that opens the window?

    Synonyms: how about, what if

Synonyms & antonyms

adverbWhy is that so? (for a negative statement)

Similar
why?how come?

adverbUsed to state that one has no objection to and approves of a proposal.

adverbUsed to introduce a proposal.

Translations

Arabic لِمَ لَا
  • لِمَ لَا (lima lā)state one has no objection
Bulgarian защо пък не
  • защо пък не (zašto păk ne)state one has no objection
Chinese Mandarin 何不, 為什麼不呢 /为什么不呢
  • 何不 (hébù)why is that not true
  • 為什麼不呢 /为什么不呢 (wèishéme bù ne)why is that not true
  • 為什麼 /为什么 (wèishénme)why is that not true
  • 好的 (hǎo de)state one has no objection
  • 要不 (yàobù)introduce a proposal
Danish hvorfor ikke, hvorfor ikke
  • hvorfor ikkewhy is that not true
  • hvorfor ikkestate one has no objection
  • hvorfor ikkeintroduce a proposal
Esperanto kial ne, kial ne
  • kial newhy is that not true
  • kial nestate one has no objection
Finnish miksi ei, miksei
  • miksi eiwhy is that not true
  • mikseiwhy is that not true
  • miksipä eistate one has no objection
  • mikä etteistate one has no objection
  • mikä jotteistate one has no objection
  • mikäpäs siinästate one has no objection
  • voisstate one has no objection
  • miksi eiintroduce a proposal
French pourquoi pas, pourquoi pas
  • pourquoi paswhy is that not true
  • pourquoi passtate one has no objection
  • pourquoi ne pasintroduce a proposal
German warum nicht, warum nicht
  • warum nichtwhy is that not true
  • warum nichtstate one has no objection
  • wieso nichtstate one has no objection
Hebrew לָמָּה לֹא
  • לָמָּה לֹא (láma ló)state one has no objection
Hungarian miért ne
  • miért nestate one has no objection
Icelandic af hverju ekki, hví ekki
  • af hverju ekkiwhy is that not true
  • hví ekkiwhy is that not true
  • af hverju ekkistate one has no objection
  • hví ekkistate one has no objection
  • af hverju ekkiintroduce a proposal
Indonesian kenapa tidak, tentu saja
  • kenapa tidakwhy is that not true
  • tentu sajastate one has no objection
  • bagaimana kalauintroduce a proposal
Italian perché no, perché no
  • perché nowhy is that not true
  • perché nostate one has no objection
Japanese 当たり前でしょ, もちろん
  • 当たり前でしょ (atarimaedesho)why is that not true
  • もちろん (mochiron)state one has no objection
Latin cūr nōn, quidnī
  • cūr nōnwhy is that not true
  • quidnīwhy is that not true
  • quid nistate one has no objection
  • quid niintroduce a proposal
Norwegian Bokmål hvorfor ikke, hvorfor ikke
  • hvorfor ikkestate one has no objection
  • hvorfor ikkeintroduce a proposal
Persian چرا, چرا که نه؟
  • چرا (čerâ)why is that not true
  • چرا که نه؟ (čerâ ke na?)state one has no objection
Polish czemu nie, czemu nie
  • czemu niestate one has no objection
  • czemu nieintroduce a proposal
  • dlaczego nieintroduce a proposal
  • może byintroduce a proposal
Portuguese por que não, por que não
  • por que nãowhy is that not true
  • por que nãostate one has no objection
  • por que nãointroduce a proposal
Russian а почему́, а что́ так
  • а почему́ (a počemú)why is that not true
  • а что́ так (a štó tak)why is that not true
  • почему́ бы и нет (počemú by i net)state one has no objection
  • почему́ бы не (počemú by ne)introduce a proposal
Spanish por qué no, por qué no
  • por qué nowhy is that not true
  • por qué nostate one has no objection
  • por qué nointroduce a proposal
Swedish varför inte, varför inte
  • varför intewhy is that not true
  • varför intestate one has no objection
  • varför inteintroduce a proposal
Tagalog bakit hindi, bakit hindi
  • bakit hindiwhy is that not true
  • bakit hindistate one has no objection
  • bakit hindiintroduce a proposal
Thai ทำไมไม่
  • ทำไมไม่why is that not true
Turkish neden olmasın
  • neden olmasınstate one has no objection
Ukrainian чому́ б і ні́
  • чому́ б і ні́ (čomú b i ní)state one has no objection
Cite this entry
APA

why not. (n.d.). In WatkinsX Dictionary. Retrieved November 3, 2026, from https://dictionary.watkinsx.com/word/why%20not

MLA

“why not.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/why%20not. Accessed November 3, 2026.

Chicago

WatkinsX Dictionary, s.v. “why not,” accessed November 3, 2026, https://dictionary.watkinsx.com/word/why%20not.

Source: why not on Wiktionary, CC BY-SA 4.0.