Verbseoul.
하다 verb (adj)
풍부하다pungbuhadarich, plentiful, abundant, ample

To say rich, plentiful, abundant, ample politely in the present tense, use 풍부해요 (poong-boo-hae-yoh). Below is the full conjugation of 풍부하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
풍부해
poong-boo-hae
풍부해요
poong-boo-hae-yoh
풍부합니다
poong-boo-hahm-nee-dah
Past
풍부했어
poong-boo-hae-ssuh
풍부했어요
poong-boo-hae-ssuh-yoh
풍부했습니다
poong-boo-hae-sseum-nee-dah
Future
풍부할 거야
poong-boo-hahl- -guh-yah
풍부할 거예요
poong-boo-hahl- -guh-yae-yoh
풍부할 겁니다
poong-boo-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
풍부하세요
poong-boo-hah-sae-yoh
Suggestion / Let's Polite (요)
풍부해요
poong-boo-hae-yoh
Question Polite (요)
풍부해요?
poong-boo-hae-yoh-?
Connective “and” — (고)
풍부하고
poong-boo-hah-goh
Conditional “if” — (면)
풍부하면
poong-boo-hah-myuhn
Noun form — (기)
풍부함
poong-boo-hahm