Verbs · Regular

끓이다 conjugation

to boil (something); to make (soup, ramyeon) · kkeurida · sounds like [끄리다]

Short answer: “To boil (something)” in Korean is 끓이다 (kkeurida), which also means to make (soup, ramyeon). Polite present: 끓여요 (kkeuryeoyo); past: 끓였어요 (kkeuryeosseoyo); future: 끓일 거예요. It is regular.

Present끓여요[끄려요] · kkeuryeoyo
Past끓였어요[끄려써요] · kkeuryeosseoyo
Future끓일 거예요[끄릴 꺼예요] · kkeuril geoyeyo
Negative안 끓여요[안 끄려요] · an kkeuryeoyo

끓이다 in sentences

라면을 끓였어요.I made ramyeon.
물을 먼저 끓여야 해요.You have to boil the water first.

All forms of 끓이다

Present
Polite (해요) is the everyday safe choice; formal (합니다) is for news, announcements and work; casual (반말) is for close friends and younger people.
Form	Korean	Sounds like	Romanized
polite-아/어요	끓여요	[끄려요]	kkeuryeoyo
formal-(스)ㅂ니다	끓입니다	[끄림니다]	kkeurimnida
casual-아/어	끓여	[끄려]	kkeuryeo
plain (written)-(느)ㄴ다	끓인다	[끄린다]	kkeurinda
formal question-(스)ㅂ니까?	끓입니까?	[끄림니까]	kkeurimnikka?
is …ing (polite)-고 있어요	끓이고 있어요	[끄리고 이써요]	kkeurigo isseoyo

Past
Form	Korean	Sounds like	Romanized
polite-았/었어요	끓였어요	[끄려써요]	kkeuryeosseoyo
formal-았/었습니다	끓였습니다	[끄렫씀니다]	kkeuryeotseumnida
casual-았/었어	끓였어	[끄려써]	kkeuryeosseo
plain (written)-았/었다	끓였다	[끄렫따]	kkeuryeotda

Future
Form	Korean	Sounds like	Romanized
polite — will-(으)ㄹ 거예요	끓일 거예요	[끄릴 꺼예요]	kkeuril geoyeyo
formal-(으)ㄹ 겁니다	끓일 겁니다	[끄릴 껌니다]	kkeuril geomnida
casual-(으)ㄹ 거야	끓일 거야	[끄릴 꺼야]	kkeuril geoya
formal — I will (intention)-겠습니다	끓이겠습니다	[끄리겓씀니다]	kkeurigetseumnida

Negative
Form	Korean	Sounds like	Romanized
not (short)안 …	안 끓여요	[안 끄려요]	an kkeuryeoyo
did not안 …았/었어요	안 끓였어요	[안 끄려써요]	an kkeuryeosseoyo
not (long)-지 않아요	끓이지 않아요	[끄리지 아나요]	kkeuriji anayo
cannot못 …	못 끓여요	[몯 끄려요]	mot kkeuryeoyo

Honorific
Add -(으)시- when the subject is someone you respect (a teacher, a customer, an older person) — not yourself.
Form	Korean	Sounds like	Romanized
honorific — present-(으)세요	끓이세요	[끄리세요]	kkeuriseyo
honorific — past-(으)셨어요	끓이셨어요	[끄리셔써요]	kkeurisyeosseoyo
honorific — formal-(으)십니다	끓이십니다	[끄리심니다]	kkeurisimnida

Requests
Form	Korean	Sounds like	Romanized
please …-(으)세요	끓이세요	[끄리세요]	kkeuriseyo
please … (for me)-아/어 주세요	끓여 주세요	[끄려 주세요]	kkeuryeo juseyo
please don’t …-지 마세요	끓이지 마세요	[끄리지 마세요]	kkeuriji maseyo
let’s … (formal)-(으)ㅂ시다	끓입시다	[끄립씨다]	kkeuripsida
let’s … (casual)-자	끓이자	[끄리자]	kkeurija
do … ! (casual command)-아/어라	끓여라	[끄려라]	kkeuryeora

Connecting
Form	Korean	Sounds like	Romanized
… and-고	끓이고	[끄리고]	kkeurigo
… so / and then-아/어서	끓여서	[끄려서]	kkeuryeoseo
if …-(으)면	끓이면	[끄리면]	kkeurimyeon
… but-지만	끓이지만	[끄리지만]	kkeurijiman
because …-(으)니까	끓이니까	[끄리니까]	kkeurinikka
… and / but (background)-는데	끓이는데	[끄리는데]	kkeurineunde
even if …-아/어도	끓여도	[끄려도]	kkeuryeodo
while …-(으)면서	끓이면서	[끄리면서]	kkeurimyeonseo
in order to …-(으)려고	끓이려고	[끄리려고]	kkeuriryeogo
(go) to …-(으)러	끓이러	[끄리러]	kkeurireo
before …-기 전에	끓이기 전에	[끄리기 저네]	kkeurigi jeone
after …-(으)ㄴ 후에	끓인 후에	[끄린 후에]	kkeurin hue

Describing a noun
These go before a noun: “the food (that) I ate”, “a cold day”.
Form	Korean	Sounds like	Romanized
(that) … now-는	끓이는	[끄리는]	kkeurineun
(that) …ed-(으)ㄴ	끓인	[끄린]	kkeurin
(that) will …-(으)ㄹ	끓일	[끄릴]	kkeuril

Useful patterns
Form	Korean	Sounds like	Romanized
I want to …-고 싶어요	끓이고 싶어요	[끄리고 시퍼요]	kkeurigo sipeoyo
can …-(으)ㄹ 수 있어요	끓일 수 있어요	[끄릴 쑤 이써요]	kkeuril su isseoyo
cannot …-(으)ㄹ 수 없어요	끓일 수 없어요	[끄릴 쑤 업써요]	kkeuril su eopseoyo
have to …-아/어야 해요	끓여야 해요	[끄려야 해요]	kkeuryeoya haeyo
may … / it’s OK to …-아/어도 돼요	끓여도 돼요	[끄려도 돼요]	kkeuryeodo dwaeyo
must not …-(으)면 안 돼요	끓이면 안 돼요	[끄리면 안 돼요]	kkeurimyeon an dwaeyo
…ing (noun)-기	끓이기	[끄리기]	kkeurigi

How 끓이다 changes

끓이 ends in a vowel, so 끓이 + 아/어 becomes 끓여 → 끓여요, 끓였어요. Endings written -(으) attach directly → 끓이면, 끓일. 끓이다 is regular.

How every verb type works → · Why it sounds like that →

Questions

How do you say “boil” in Korean?

“To boil (something)” is 끓이다 (kkeurida), pronounced [끄리다]. In a sentence: 라면을 끓였어요. — I made ramyeon.

What is the past tense of 끓이다?

끓였어요 (kkeuryeosseoyo) is the polite past tense of 끓이다 (“to boil (something)”). Formal: 끓였습니다; casual: 끓였어.

How do you say 끓이다 politely?

Everyday polite: 끓여요 (kkeuryeoyo). Formal: 끓입니다. Casual, with close friends: 끓여.

How do you say “I want to boil” in Korean?

끓이고 싶어요 (kkeurigo sipeoyo), pronounced [끄리고 시퍼요].

Is 끓이다 irregular?

No. 끓이 ends in a vowel, so 끓이 + 아/어 becomes 끓여 → 끓여요, 끓였어요. Endings written -(으) attach directly → 끓이면, 끓일. 끓이다 is regular.

More regular words like 끓이다

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Forms follow 한글 맞춤법 (Korean spelling rules); pronunciation follows 표준 발음법 and romanization follows 국어의 로마자 표기법 (Revised Romanization). Last updated October 16, 2026. How we check