Hangul syllable Jass

잤 is the Korean past form of 자다 (“to sleep”): someone slept. The ending after it marks casual, polite, or plain speech; alone, 잤 usually needs the rest of a sentence.

Text symbol

What 잤 means

It marks sleep as already happened. In 잤어, 잤어요, and 잤다, the ending sets casual, polite, or plain speech. Alone, 잤 usually needs the rest of its sentence.

자다 can also mean that a machine is off, something lies unused, or people have sex. Hangul was created in 1443 to write Korean sounds in syllable blocks.

Usually neutral; the ending sets politeness.

In an intimate context, 자다 can mean “have sex”; 잤 alone does not imply that reading.

Part of the collection

가

Korean Syllables (Hangul Characters)

Who writes 잤

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What it means when someone sends it to you

3 readings

Casual question: “Did you sleep?”

Combination ideas

Casual check-in: “Did you sleep well?”

Questions people ask

Why does 잤 show as a box on some devices?

Because that device's fonts have no glyph for it. The character is still correct and still copies correctly — the box is a missing glyph, not a broken character.