Verbseoul.
하다 verb (adj)
갸름하다gyareumhadaslender, slim

To say slender, slim politely in the present tense, use 갸름해요 (gyah-reum-hae-yoh). Below is the full conjugation of 갸름하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
갸름해
gyah-reum-hae
갸름해요
gyah-reum-hae-yoh
갸름합니다
gyah-reum-hahm-nee-dah
Past
갸름했어
gyah-reum-hae-ssuh
갸름했어요
gyah-reum-hae-ssuh-yoh
갸름했습니다
gyah-reum-hae-sseum-nee-dah
Future
갸름할 거야
gyah-reum-hahl- -guh-yah
갸름할 거예요
gyah-reum-hahl- -guh-yae-yoh
갸름할 겁니다
gyah-reum-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
갸름하세요
gyah-reum-hah-sae-yoh
Suggestion / Let's Polite (요)
갸름해요
gyah-reum-hae-yoh
Question Polite (요)
갸름해요?
gyah-reum-hae-yoh-?
Connective “and” — (고)
갸름하고
gyah-reum-hah-goh
Conditional “if” — (면)
갸름하면
gyah-reum-hah-myuhn
Noun form — (기)
갸름함
gyah-reum-hahm