어느덧

eoneudeot [어느덛]

어느덧 + time passing: 어느덧 1년이 지났어요

before one knows it, already (time has passed)

Example

한국에 온 지 어느덧 3년이 되었어요.

Before I knew it, three years had passed since I came to Korea.

Word parts

어느 'some, which' + 덧 'short while'.