헛헛해요 · 헛헛했어요 · 헛헛한 (+noun)
empty, hollow (feeling); a bit hungry
Example
친구들이 다 떠나고 나니 마음이 헛헛해요.
Now that all my friends have left, I feel empty inside.
Word parts
Probably related to 헛- 'empty, in vain', as in 헛수고 'wasted effort'.
Good to know
Also means slightly hungry: 배가 헛헛하다, close to 출출하다.
Related words