오매불망이 · 오매불망을
longing day and night; never forgetting, even in sleep
Example
할머니는 오매불망 손자가 돌아오기만 기다리셨어요.
Grandma waited day and night, longing only for her grandson to come back.
Word parts
오 awake+매 asleep+불 not+망 forget
Literally 'awake or asleep, never forgetting.'
Related words