드디어 끝났어요.

The phrase '드디어 끝났어요' is composed of '드디어' (deu-di-eo), meaning 'finally' or 'at last', and '끝났어요' (kkeut-nat-sseo-yo), which is the past tense honorific form of '끝나다' (kkeut-na-da), meaning 'to end' or 'to be finished'. The origin of '드디어' can be traced back to the Middle Korean '디여' (tteut-di-yeo), which also conveyed the sense of something happening at last after a long wait. '끝나다' is derived from '끝' (kkeut), meaning 'end' or 'finish', combined with the verb suffix '-나다' (-na-da), indicating completion or occurrence. Therefore, the phrase literally means 'at last, it has ended' or 'finally, it is finished', expressing relief or satisfaction.