A conjunction meaning 'but' or 'however', used to introduce a contrasting or opposing statement; equivalent to 'けれども'.
行きたいけれど、お金が足りない。
I want to go, but I don't have enough money.
雨が降っているけれど、試合は予定通り行われる。
Although it's raining, the game will be held as scheduled.
その案は良いけれど、時間がかかりそうだ。
That idea is good, but it seems like it will take time.