Verbseoul.
하다 verb (adj)
부족하다bujokhadato be insufficient

To say to be insufficient politely in the present tense, use 부족해요 (boo-choh-kae-yoh). Below is the full conjugation of 부족하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
부족해
boo-choh-kae
부족해요
boo-choh-kae-yoh
부족합니다
boo-choh-kahm-nee-dah
Past
부족했어
boo-choh-kae-ssuh
부족했어요
boo-choh-kae-ssuh-yoh
부족했습니다
boo-choh-kae-sseum-nee-dah
Future
부족할 거야
boo-choh-kahl- -guh-yah
부족할 거예요
boo-choh-kahl- -guh-yae-yoh
부족할 겁니다
boo-choh-kahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
부족하세요
boo-choh-kah-sae-yoh
Suggestion / Let's Polite (요)
부족해요
boo-choh-kae-yoh
Question Polite (요)
부족해요?
boo-choh-kae-yoh-?
Connective “and” — (고)
부족하고
boo-choh-kah-goh
Conditional “if” — (면)
부족하면
boo-choh-kah-myuhn
Noun form — (기)
부족함
boo-choh-kahm