conjunction
Casual conjunction used to connect contrasting statements. Often used at the beginning of a sentence or clause. More conversational than しかし or だが.
彼は優しい。だけど、時々厳しいことも言う。
He is kind. But sometimes he says harsh things too.
行きたい。だけど、時間がない。
I want to go. However, I don't have time.