だい (Dai) is a Japanese particle meaning “is it?, isn't it?, be, is”.

Meanings

  1. particleis it?; isn't it?marks wh-question (what, where, who)
  2. particlebe; isstrengthens one's judgment or conclusion

Examples

  • How about you?

  • Whose turn is it next?

  • What're you going to do this weekend?

Sentences from Tatoeba (CC BY 2.0 FR).