Verbseoul.
하다 verb
누적하다nujeokhadato accumulate

To say to accumulate politely in the present tense, use 누적해요 (noo-chuh-kae-yoh). Below is the full conjugation of 누적하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
누적해
noo-chuh-kae
누적해요
noo-chuh-kae-yoh
누적합니다
noo-chuh-kahm-nee-dah
Past
누적했어
noo-chuh-kae-ssuh
누적했어요
noo-chuh-kae-ssuh-yoh
누적했습니다
noo-chuh-kae-sseum-nee-dah
Future
누적할 거야
noo-chuh-kahl- -guh-yah
누적할 거예요
noo-chuh-kahl- -guh-yae-yoh
누적할 겁니다
noo-chuh-kahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
누적하세요
noo-chuh-kah-sae-yoh
Suggestion / Let's Polite (요)
누적해요
noo-chuh-kae-yoh
Question Polite (요)
누적해요?
noo-chuh-kae-yoh-?
Connective “and” — (고)
누적하고
noo-chuh-kah-goh
Conditional “if” — (면)
누적하면
noo-chuh-kah-myuhn
Noun form — (기)
누적함
noo-chuh-kahm