사동 -이/히/리/기/우/구/추-

The causative suffixes -이-/-히-/-리-/-기-/-우-/-구-/-추- mean 'make or let someone do something / make something happen'.

변화·피동·사동Change, passive & causative

Han: Putting a baby to sleep with your own hands is 재우다; 자게 하다 sounds like you just let or made it sleep.

Examples

음악 소리를 좀 낮춰 주시겠어요?Could you turn the music down a little?

엄마가 아이에게 밥을 먹여요.The mother is feeding the child.

아침 7시에 저를 깨워 주세요.Please wake me up at 7 a.m.

V/A-stem+이/히/리/기/우/구/추+다

먹다 → 먹이다, 입다 → 입히다, 울다 → 울리다, 웃다 → 웃기다, 깨다 → 깨우다, 낮다 → 낮추다

The person made to act takes 에게/한테 or 을/를: 아이에게 밥을 먹였어요.
Some passive and causative forms look the same (보이다 'be seen' / 'show'); context decides.
Common ones: 먹이다, 입히다, 신기다, 씻기다, 재우다, 깨우다, 태우다, 낮추다, 늦추다.

Wrong: ~~아기를 자게 했어요. (putting a baby to bed yourself)~~

Right: 아기를 재웠어요.

Putting a baby to sleep with your own hands is 재우다; 자게 하다 sounds like you just let or made it sleep.

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