Hangul syllable gweom

It is a syllable block, not a word definition.

궘 is romanized as gweom and sounds roughly like “kwuhm”: begin with a k-like sound, move into a short “uh”-like vowel, and end with m. Its jamo—the component letters used to build Hangul syllables—are ㄱ (initial consonant), ㅝ (vowel), and ㅁ (final consonant). In a Korean word, surrounding syllables supply the meaning.

Before Hangul, Korean writers adapted Chinese characters to write Korean. King Sejong created Hangul in 1443 because Korean and Chinese differed and Chinese-character writing was hard to use for Korean. The script was first called Hunminjeongeum; a 1446 book with the same name explained its principles. 궘 is one regular combination of Hangul letters, not a separately invented sign.

Why does 궘 look different in different fonts?

The pieces may be drawn differently or stored separately.

Unicode represents 궘 as one syllable block or as the equivalent conjoining jamo ᄀ + ᅯ + ᆷ. A Korean input method may compose those jamo; normalization can also turn the equivalent sequence into one block.

Fonts can change the components’ size, placement, and shape inside the syllable cell. A visual difference alone does not mean the text contains a different syllable.