Verbseoul.
하다 verb (adj)
당당하다dangdanghadastately, imposing, dignified, confident

To say stately, imposing, dignified, confident politely in the present tense, use 당당해요 (dahng-dahng-hae-yoh). Below is the full conjugation of 당당하다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
당당해
dahng-dahng-hae
당당해요
dahng-dahng-hae-yoh
당당합니다
dahng-dahng-hahm-nee-dah
Past
당당했어
dahng-dahng-hae-ssuh
당당했어요
dahng-dahng-hae-ssuh-yoh
당당했습니다
dahng-dahng-hae-sseum-nee-dah
Future
당당할 거야
dahng-dahng-hahl- -guh-yah
당당할 거예요
dahng-dahng-hahl- -guh-yae-yoh
당당할 겁니다
dahng-dahng-hahl- -guhm-nee-dah

Other useful forms

Command Polite (세요)
당당하세요
dahng-dahng-hah-sae-yoh
Suggestion / Let's Polite (요)
당당해요
dahng-dahng-hae-yoh
Question Polite (요)
당당해요?
dahng-dahng-hae-yoh-?
Connective “and” — (고)
당당하고
dahng-dahng-hah-goh
Conditional “if” — (면)
당당하면
dahng-dahng-hah-myuhn
Noun form — (기)
당당함
dahng-dahng-hahm