soriga neomu keoseo jamdeulgi eoryeowoyo.

The sound is so loud that it’s hard to fall asleep.

Breakdown of soriga neomu keoseo jamdeulgi eoryeowoyo.

• ~가: subject particle
• 어렵다: difficult
• 잠들다: to fall asleep
• ~어서: because / so

Questions & Answers about soriga neomu keoseo jamdeulgi eoryeowoyo.

What does -아서/-어서 mean in 커서?

-아서/-어서 connects two clauses and often means because/so (cause → result).

• 소리가 너무 커서 = Because the sound is too loud / The sound is so loud that…
  Then the result follows: 잠들기 어려워요.

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How do I know whether to use -아서 or -어서?

It depends on the last vowel of the verb/adjective stem:

• If the stem vowel is ㅏ or ㅗ, use -아서.
• Otherwise, use -어서.

Here: 크다 (to be big/loud) → stem 크- (vowel ㅡ, not ㅏ/ㅗ) → 커서 (irregular-looking but regular contraction: 크 + 어서 → 커서).

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Why is 크다 used for “loud”? Isn’t that “big”?

In Korean, 크다 literally means to be big, but it’s also commonly used for loud when talking about sound/volume:

• 소리가 크다 = the sound is loud
  A very common alternative is 시끄럽다 (noisy), but that has a slightly different nuance (more like “annoyingly noisy” rather than just “high volume”).

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