순간이 · 순간을
moment, instant
Example
그 사람을 본 순간 사랑에 빠졌어요.
I fell in love the moment I saw that person.
Word parts
순 blink+간 interval
Literally 'the space of a blink'.
Good to know
V-(으)ㄴ 순간 means 'the moment (someone) did': 문을 연 순간 'the moment I opened the door.'
Related words