だって
(Datte)
because / but / however (casual defensive).
Connection rules
- +だって [sentence].
- +Casual / defensive — giving a reason in response to a question or criticism.
- +Distinct from the particle 〜だって ('even / also') used after nouns.
Examples
1.
だって、嫌なんだもん。

Datte, iya na n da mon.
But I just don't want to!
「because / but / however (casual defensive)」
2.
だって、本当のことだよ。

Datte, hontou no koto da yo.
Because it's the truth.
「because / but / however (casual defensive)」
Practice
But I couldn't help it, I was busy!
どうしてやってくれなかったの?___。
Romaji also accepted