you'll need to talk about sadness.
Here are a few starter words featuring Hamtaro:
To be Sad:
슬프다 (슬퍼요)
(seul-peu-da (seul-peo-yo))
To be Worried:
고민하다
(go-min-ha-da)
This means to worry a lot over something. To have a lot on your mind.
To be Lonely:
외롭다 (외로워요)
(wae-rop-da (wae-ro-weo-yo))
To be Disappointed:
실망하다
(shil-mang-ha-da)
To be Envious:
부럽다 (부러워요)
(boo-reop-da (boo-reo-weo-yo))
Don't Give Up!
포기하지 말아요!!!!!!
(po-gi-ha-ji-ma-ra-yo!!!!)