과분해요 · 과분했어요 · 과분한 (+noun)
more than one deserves, undeserved, too generous
Example
이렇게 큰 상은 저에게 정말 과분해요.
Such a big award is really more than I deserve.
Word parts
과 exceed+분 share
Literally 'beyond one's share'.
Good to know
A humble set phrase: 과분한 칭찬이에요 'You're too kind', when accepting praise.