-도록
so that; until; to the point that
Level 3 · Connective
Explanation
Marks a purpose or the degree/limit of an action (밤새도록, 늦지 않도록). Attaches to the stem. -도록 하다 gives a polite instruction (일찍 오도록 하세요).
Examples
감기에 걸리지 않도록 옷을 따뜻하게 입으세요.
Dress warmly so you don't catch a cold.
목이 아프도록 노래를 불렀어요.
I sang until my throat hurt.
다음부터는 늦지 않도록 하겠습니다.
I'll make sure not to be late from now on.
TOPIK note
TOPIK II Reading 1–2, 3–4; Writing 51 (notices).