둘다 means “both” or “both of them.” It refers to two things or people together.
Usage Examples:
Referring to two items:
사과와 바나나 중에 뭐 먹을래? (Which do you want, an apple or a banana?)
둘다 먹고 싶어요! (I want to eat both!)
Talking about two people or options:
형과 동생 중에 누가 더 똑똑해? (Who’s smarter, your older or younger sibling?)
둘다 똑똑해요. (Both are smart.)
Confirming two choices:
커피랑 차 중에 뭐 마실래? (Do you want coffee or tea?)
둘다 괜찮아요. (Both are fine.)