눈치채요 · 눈치챘어요 · 눈치챌 거예요 · 눈치챈 (+noun)
to notice, to sense, to catch on
Example
엄마는 제가 거짓말한 걸 바로 눈치챘어요.
My mom caught on right away that I had lied.
Word parts
눈치 'social sense' plus 채다 'to catch on.'
Good to know
Written as one word, unlike the phrase 눈치를 보다.