뒤떨어져요 · 뒤떨어졌어요 · 뒤떨어질 거예요 · 뒤떨어진 (+noun)
to fall behind, to lag behind; to be outdated
Example
이 휴대폰은 디자인이 좀 뒤떨어져요.
This phone's design is a bit outdated.
Word parts
뒤 'behind' + 떨어지다 'to drop away': dropping behind others.
Good to know
시대에 뒤떨어지다 'to be behind the times' is a common phrase.
Related words