한껏 + verb: 한껏 멋을 내다, 한껏 기대하다
to the fullest, as much as possible, to one's heart's content
Example
그녀는 파티에 가려고 한껏 멋을 냈어요.
She dressed up to the nines to go to the party.
Word parts
한 'the limit' + -껏 'to the extent of', as in 힘껏, 마음껏.
Good to know
Pronounced [한껃]; 한껏 멋을 내다 'to dress up to the max' is a common chunk.