Verbseoul.
르 irregular
휘두르다hwidureudato brandish, to wield (a melee weapon (e.g. a sword))

To say to brandish, to wield (a melee weapon (e.g. a sword)) politely in the present tense, use 휘둘러요 (hwee-dool-ruh-yoh). Below is the full conjugation of 휘두르다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
휘둘러
hwee-dool-ruh
휘둘러요
hwee-dool-ruh-yoh
휘두릅니다
hwee-doo-reum-nee-dah
Past
휘둘렀어
hwee-dool-ruh-ssuh
휘둘렀어요
hwee-dool-ruh-ssuh-yoh
휘둘렀습니다
hwee-dool-ruh-sseum-nee-dah
Future
휘두를 거야
hwee-doo-reul- -guh-yah
휘두를 거예요
hwee-doo-reul- -guh-yae-yoh
휘두를 겁니다
hwee-doo-reul- -guhm-nee-dah

Other useful forms

Command Polite (세요)
휘두르세요
hwee-doo-reu-sae-yoh
Suggestion / Let's Polite (요)
휘둘러요
hwee-dool-ruh-yoh
Question Polite (요)
휘둘러요?
hwee-dool-ruh-yoh-?
Connective “and” — (고)
휘두르고
hwee-doo-reu-goh
Conditional “if” — (면)
휘두르면
hwee-doo-reu-myuhn
Noun form — (기)
휘두름
hwee-doo-reum