다섯째
daseotjjae · TOPIK 1
fifth
다섯 (five) + 째 (ordinal suffix) = fifth
다섯 is the native Korean number five, and 째 is the suffix that turns a count into a rank, like -th in English. The same pattern gives 넷째 (fourth) and 여섯째 (sixth), so learning 째 once unlocks the whole series.