neutge jaseo pigonhaeyo.

I'm tired because I slept late.

Breakdown of neutge jaseo pigonhaeyo.

• 자다: to sleep
• 피곤하다: tired
• 늦게: late

Questions & Answers about neutge jaseo pigonhaeyo.

What does 늦게 mean and how is it formed?

늦다 means “to be late.” To turn it into an adverb, attach -게:
늦다 + -게 → 늦게, meaning “late(ly).”

What does the -서 ending in 자서 do?

The ending -서 (from -아서/어서) connects a cause to an effect, meaning “because.” Here you have:
자다 (to sleep) + -아서 → 자아서 → 자서 (contracted) = “because I slept.”

Why is 자아서 contracted to 자서 instead of being written 자아서?

Korean phonology merges repeated vowels:
자 + 아서 → 자아서, which contracts to 자서 for ease of pronunciation.

What does 피곤해요 mean, and how is it constructed?

피곤하다 is the adjective “to be tired.” Drop the dictionary ending -다 and add the polite present ending -해요:
피곤하다 → 피곤하 + 해요 → 피곤해요 = “(I) am tired.”

Why is there no subject like “I” or “you” in the sentence?

Korean often omits the subject when it’s understood from context. Here, the speaker implies “I,” so you don’t need to say 저는 or 내가 explicitly.

Could I use -기 때문에 instead of -서 to show cause?

Yes. -기 때문에 is more formal/literal:
늦게 자서 피곤해요. (I’m tired because I slept late.)
늦게 자았기 때문에 피곤해요. (More formal: “Because I slept late, I’m tired.”)

Can I change the word order, for example putting 피곤해요 before 늦게 자서?

In spoken Korean you might hear:
피곤해요, 늦게 자서.
But the neutral, flow-on style is cause first (늦게 자서) then result (피곤해요).