Verbseoul.
ㄹ stem (adj)
거칠다geochildato be rough or coarse in texture

To say to be rough or coarse in texture politely in the present tense, use 거칠어요 (guh-chee-ruh-yoh). Below is the full conjugation of 거칠다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
거칠어
guh-chee-ruh
거칠어요
guh-chee-ruh-yoh
거칩니다
guh-cheem-nee-dah
Past
거칠었어
guh-chee-ruh-ssuh
거칠었어요
guh-chee-ruh-ssuh-yoh
거칠었습니다
guh-chee-ruh-sseum-nee-dah
Future
거칠 거야
guh-cheel- -guh-yah
거칠 거예요
guh-cheel- -guh-yae-yoh
거칠 겁니다
guh-cheel- -guhm-nee-dah

Other useful forms

Command Polite (세요)
거치세요
guh-chee-sae-yoh
Suggestion / Let's Polite (요)
거칠어요
guh-chee-ruh-yoh
Question Polite (요)
거칠어요?
guh-chee-ruh-yoh-?
Connective “and” — (고)
거칠고
guh-cheel-goh
Conditional “if” — (면)
거칠면
guh-cheel-myuhn
Noun form — (기)
거칢
guh-cheem