잠들다

Meanings

fall asleep; sink into a sleepTo come to be in the state of sleeping.
fall asleep(figurative) For a wind, wave, sound, etc., to become still.
pass away; rest(euphemism) To die.

Examples from Lessons (3)

어제 도 연습 하려고 했는데 피곤해서 결국 잠들고 말았거든.
I tried to practice yesterday too, but I was so tired that I ended up falling asleep.
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응, 나도 보려고 TV를 켜려다가 너무 피곤해서 그냥 바로 잠들었어.
Yeah, I was going to turn on the TV to watch it too, but I was so tired that I just fell straight asleep.
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아, 말 도 마, 알람을 못 듣고 잠들어서 하마터면 큰일 날 뻔 했 잖아.
Oh, don't even ask, I didn't hear my alarm and fell back asleep so I almost had a huge disaster.
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Grammar in These Examples

-고 말다Level 3End up doing, finally do -아/어Level 1Informal ending -(으)ㄹ 것Level 3Future tense noun modifier -고Level 1And, and then