Verbseoul.
ㅂ irregular (adj)
매끄럽다maekkeureopdato be smooth, velvety, slippery

To say to be smooth, velvety, slippery politely in the present tense, use 매끄러워요 (mae-ggeu-ruh-wuh-yoh). Below is the full conjugation of 매끄럽다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
매끄러워
mae-ggeu-ruh-wuh
매끄러워요
mae-ggeu-ruh-wuh-yoh
매끄럽습니다
mae-ggeu-ruhp-sseum-nee-dah
Past
매끄러웠어
mae-ggeu-ruh-wuh-ssuh
매끄러웠어요
mae-ggeu-ruh-wuh-ssuh-yoh
매끄러웠습니다
mae-ggeu-ruh-wuh-sseum-nee-dah
Future
매끄러울 거야
mae-ggeu-ruh-ool- -guh-yah
매끄러울 거예요
mae-ggeu-ruh-ool- -guh-yae-yoh
매끄러울 겁니다
mae-ggeu-ruh-ool- -guhm-nee-dah

Other useful forms

Command Polite (세요)
매끄러우세요
mae-ggeu-ruh-oo-sae-yoh
Suggestion / Let's Polite (요)
매끄러워요
mae-ggeu-ruh-wuh-yoh
Question Polite (요)
매끄러워요?
mae-ggeu-ruh-wuh-yoh-?
Connective “and” — (고)
매끄럽고
mae-ggeu-ruhp-goh
Conditional “if” — (면)
매끄러우면
mae-ggeu-ruh-oo-myuhn
Noun form — (기)
매끄러움
mae-ggeu-ruh-oom