Verbseoul.
ㄹ stem

흔들다 conjugation (heundeulda, to cause to dangle, shake, wave, or undulate)

To say to cause to dangle, shake, wave, or undulate politely in the present tense, use 흔들어요 (heun-deu-ruh-yoh) · heundeureoyo. Below is the full conjugation of 흔들다 across the three tenses and three everyday speech levels.

Grammar note (ㄹ stem): ㄹ-stem verbs end in ㄹ as the final consonant. They are conjugated regularly with vowel suffixes (살다 → 살아요), but the ㄹ drops before certain consonant suffixes — specifically before ㄴ, ㅂ, ㅅ, and before the formal ending 습니다: 살다 → 사는, 삽니다, 살지 (ㄹ kept before ㅈ). This is sometimes called a "ㄹ drop" or "ㄹ irregular." See all ㄹ-stem verbs →

Conjugation table

pron. = pronunciation guide  · RR = Revised Romanization

Highlighted = where the stem changes

TenseCasual (반말)Polite (요)Formal (합니다)
Present
흔들어
heun-deu-ruh
heundeureo
흔들어요
heun-deu-ruh-yoh
heundeureoyo
흔듭니다
heun-deum-nee-dah
heundeumnida
Past
흔들었어
heun-deu-ruh-ssuh
heundeureosseo
흔들었어요
heun-deu-ruh-ssuh-yoh
heundeureosseoyo
흔들었습니다
heun-deu-ruh-sseum-nee-dah
heundeureosseumnida
Future
흔들 거야
heun-deul guh-yah
heundeul geoya
흔들 거예요
heun-deul guh-yae-yoh
heundeul geoyeyo
흔들 겁니다
heun-deul guhm-nee-dah
heundeul geomnida

Other useful forms

Honorific / Command Polite (-(으)세요)
흔드세요
heun-deu-sae-yoh
heundeuseyo
Suggestion / Let's Polite (요)
흔들어요
heun-deu-ruh-yoh
heundeureoyo
Question Polite (요)
흔들어요?
heun-deu-ruh-yoh-?
heundeureoyo?
Connective "and" — (고)
흔들고
heun-deul-goh
heundeulgo
Conditional "if" — (면)
흔들면
heun-deul-myuhn
heundeulmyeon
Progressive (고 있어요)
흔들고 있어요
heun-deul-goh ee-ssuh-yoh
heundeulgo isseoyo
Want to (고 싶어요)
흔들고 싶어요
heun-deul-goh shee-puh-yoh
heundeulgo sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
흔들 수 있어요
heun-deul soo ee-ssuh-yoh
heundeul su isseoyo
Because / So (아/어서)
흔들어서
heun-deu-ruh-suh
heundeureoseo
Noun form — (기)
흔들기
heun-deul-gee
heundeulgi
Noun form — (음)
흔듦
heun-deum
heundeum