Verbseoul.
ㄹ stem
시들다sideuldato wither, to wilt, to droop

To say to wither, to wilt, to droop politely in the present tense, use 시들어요 (shee-deu-ruh-yoh). Below is the full conjugation of 시들다 across the three tenses and three everyday speech levels.

Conjugation table

TenseCasual (반말)Polite (요)Formal (합니다)
Present
시들어
shee-deu-ruh
시들어요
shee-deu-ruh-yoh
시듭니다
shee-deum-nee-dah
Past
시들었어
shee-deu-ruh-ssuh
시들었어요
shee-deu-ruh-ssuh-yoh
시들었습니다
shee-deu-ruh-sseum-nee-dah
Future
시들 거야
shee-deul- -guh-yah
시들 거예요
shee-deul- -guh-yae-yoh
시들 겁니다
shee-deul- -guhm-nee-dah

Other useful forms

Command Polite (세요)
시드세요
shee-deu-sae-yoh
Suggestion / Let's Polite (요)
시들어요
shee-deu-ruh-yoh
Question Polite (요)
시들어요?
shee-deu-ruh-yoh-?
Connective “and” — (고)
시들고
shee-deul-goh
Conditional “if” — (면)
시들면
shee-deul-myuhn
Noun form — (기)
시듦
shee-deum