Adjectives · 하다 word

안전하다 conjugation

to be safe · anjeonhada · sounds like [안전하다]

Short answer: “Safe” in Korean is 안전하다 (anjeonhada). Polite present: 안전해요 (anjeonhaeyo); past: 안전했어요 (anjeonhaesseoyo); future: 안전할 거예요. It is a 하다 adjective: 하 + 아/어 always becomes 해.

Present안전해요[안전해요] · anjeonhaeyo
Past안전했어요[안전해써요] · anjeonhaesseoyo
Future안전할 거예요[안전할 꺼예요] · anjeonhal geoyeyo
Negative안 안전해요[안 안전해요] · an anjeonhaeyo

Opposite: 위험하다 — to be dangerous

안전하다 in sentences

한국은 밤에도 안전해요.Korea is safe even at night.
안전한 곳에 두세요.Keep it in a safe place.

All forms of 안전하다

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	안전해요	[안전해요]	anjeonhaeyo
formal-(스)ㅂ니다	안전합니다	[안전함니다]	anjeonhamnida
casual-아/어	안전해	[안전해]	anjeonhae
plain (written)-다	안전하다	[안전하다]	anjeonhada
formal question-(스)ㅂ니까?	안전합니까?	[안전함니까]	anjeonhamnikka?

Past
Form	Korean	Sounds like	Romanized
polite-았/었어요	안전했어요	[안전해써요]	anjeonhaesseoyo
formal-았/었습니다	안전했습니다	[안전핻씀니다]	anjeonhaetseumnida
casual-았/었어	안전했어	[안전해써]	anjeonhaesseo
plain (written)-았/었다	안전했다	[안전핻따]	anjeonhaetda

Future
Form	Korean	Sounds like	Romanized
polite — will probably be-(으)ㄹ 거예요	안전할 거예요	[안전할 꺼예요]	anjeonhal geoyeyo
formal-(으)ㄹ 겁니다	안전할 겁니다	[안전할 껌니다]	anjeonhal geomnida
casual-(으)ㄹ 거야	안전할 거야	[안전할 꺼야]	anjeonhal geoya

Negative
Form	Korean	Sounds like	Romanized
not (short)안 …	안 안전해요	[안 안전해요]	an anjeonhaeyo
did not안 …았/었어요	안 안전했어요	[안 안전해써요]	an anjeonhaesseoyo
not (long)-지 않아요	안전하지 않아요	[안전하지 아나요]	anjeonhaji anayo

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	안전하세요	[안전하세요]	anjeonhaseyo
honorific — past-(으)셨어요	안전하셨어요	[안전하셔써요]	anjeonhasyeosseoyo
honorific — formal-(으)십니다	안전하십니다	[안전하심니다]	anjeonhasimnida

Connecting
Form	Korean	Sounds like	Romanized
… and-고	안전하고	[안전하고]	anjeonhago
… so / and then-아/어서	안전해서	[안전해서]	anjeonhaeseo
if …-(으)면	안전하면	[안전하면]	anjeonhamyeon
… but-지만	안전하지만	[안전하지만]	anjeonhajiman
because …-(으)니까	안전하니까	[안전하니까]	anjeonhanikka
… and / but (background)-(으)ㄴ데	안전한데	[안전한데]	anjeonhande
even if …-아/어도	안전해도	[안전해도]	anjeonhaedo
while …-(으)면서	안전하면서	[안전하면서]	anjeonhamyeonseo

Describing a noun
These go before a noun: “the food (that) I ate”, “a cold day”.
Form	Korean	Sounds like	Romanized
(that is) …-(으)ㄴ	안전한	[안전한]	anjeonhan
(that) will …-(으)ㄹ	안전할	[안전할]	anjeonhal

Useful patterns
Form	Korean	Sounds like	Romanized
can be …-(으)ㄹ 수 있어요	안전할 수 있어요	[안전할 쑤 이써요]	anjeonhal su isseoyo
cannot be …-(으)ㄹ 수 없어요	안전할 수 없어요	[안전할 쑤 업써요]	anjeonhal su eopseoyo
have to be …-아/어야 해요	안전해야 해요	[안전해야 해요]	anjeonhaeya haeyo
it’s OK if it’s …-아/어도 돼요	안전해도 돼요	[안전해도 돼요]	anjeonhaedo dwaeyo
…ly (adverb)-게	안전하게	[안전하게]	anjeonhage
becomes …-아/어지다	안전해져요	[안전해저요]	anjeonhaejeoyo
…ing (noun)-기	안전하기	[안전하기]	anjeonhagi

How 안전하다 changes

Every 하다 word works the same way: 하 + 여 becomes 해 → 안전해요, 안전했어요. With other endings 하 stays as it is: 안전합니다, 안전하면.

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

Questions

How do you say “safe” in Korean?

“Safe” is 안전하다 (anjeonhada), pronounced [안전하다]. In a sentence: 한국은 밤에도 안전해요. — Korea is safe even at night.

What is the past tense of 안전하다?

안전했어요 (anjeonhaesseoyo) is the polite past tense of 안전하다 (“to be safe”). Formal: 안전했습니다; casual: 안전했어.

How do you say 안전하다 politely?

Everyday polite: 안전해요 (anjeonhaeyo). Formal: 안전합니다. Casual, with close friends: 안전해.

How do you say “not safe” in Korean?

안 안전해요 or 안전하지 않아요. Both mean the same; the first is more common in speech.

Is 안전하다 irregular?

No. Every 하다 word works the same way: 하 + 여 becomes 해 → 안전해요, 안전했어요. With other endings 하 stays as it is: 안전합니다, 안전하면.

More 하다 words like 안전하다

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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