약속하다
yaksokhada · TOPIK 1
to make an appointment
🤝 約束 = bind + bundle: a promise ties you down, plus 하다 (to do)
약속 comes from hanja 約 (to bind, agree) + 束 (to tie in a bundle), so a promise is something you are tied to. Adding 하다 turns the noun into a verb: to do a promise. Same word as Japanese yakusoku and Chinese yuēshù.