Verbseoul.
르 irregular

거스르다 conjugation (geoseureuda, to disobey, to defy, to go against)

To say to disobey, to defy, to go against politely in the present tense, use 거슬러요 (guh-seul-ruh-yoh) · geoseulreoyo. Below is the full conjugation of 거스르다 across the three tenses and three everyday speech levels.

Grammar note (르 irregular): 르-irregular verbs and adjectives end in 르다. Before the -어/-아 suffix the 르 splits: the ㅡ vowel drops and a ㄹ is added as the final consonant of the preceding syllable. 모르다 (not to know) → 몰라요 (not *모르어요), 부르다 (to call) → 불러요. Before consonant suffixes 르 stays intact: 모르고, 부르지. See all 르-irregular verbs →

Conjugation table

pron. = pronunciation guide  · RR = Revised Romanization

Highlighted = where the stem changes

TenseCasual (반말)Polite (요)Formal (합니다)
Present
거슬러
guh-seul-ruh
geoseulreo
거슬러요
guh-seul-ruh-yoh
geoseulreoyo
거스릅니다
guh-seu-reum-nee-dah
geoseureumnida
Past
거슬렀어
guh-seul-ruh-ssuh
geoseulreosseo
거슬렀어요
guh-seul-ruh-ssuh-yoh
geoseulreosseoyo
거슬렀습니다
guh-seul-ruh-sseum-nee-dah
geoseulreosseumnida
Future
거스를 거야
guh-seu-reul guh-yah
geoseureul geoya
거스를 거예요
guh-seu-reul guh-yae-yoh
geoseureul geoyeyo
거스를 겁니다
guh-seu-reul guhm-nee-dah
geoseureul geomnida

Other useful forms

Honorific / Command Polite (-(으)세요)
거스르세요
guh-seu-reu-sae-yoh
geoseureuseyo
Suggestion / Let's Polite (요)
거슬러요
guh-seul-ruh-yoh
geoseulreoyo
Question Polite (요)
거슬러요?
guh-seul-ruh-yoh-?
geoseulreoyo?
Connective "and" — (고)
거스르고
guh-seu-reu-goh
geoseureugo
Conditional "if" — (면)
거스르면
guh-seu-reu-myuhn
geoseureumyeon
Progressive (고 있어요)
거스르고 있어요
guh-seu-reu-goh ee-ssuh-yoh
geoseureugo isseoyo
Want to (고 싶어요)
거스르고 싶어요
guh-seu-reu-goh shee-puh-yoh
geoseureugo sipeoyo
Can / Able to ((으)ㄹ 수 있어요)
거스를 수 있어요
guh-seu-reul soo ee-ssuh-yoh
geoseureul su isseoyo
Because / So (아/어서)
거슬러서
guh-seul-ruh-suh
geoseulreoseo
Noun form — (기)
거스르기
guh-seu-reu-gee
geoseureugi
Noun form — (음)
거스름
guh-seu-reum
geoseureum