囲 means “surround, enclose”

かこむ · kakomu

Also: besiege, store, paling

Kun'yomi (Japanese reading)
かこむ, かこう, かこい
On'yomi (Chinese reading)
イ

JLPT N2 · Taught in grade 5 · 7 strokes

The story

A well frame (井) with a wall (囗) all the way round it: shut in on every side. 囲む is to surround, as a family sits round the table, 範囲 is a range, like the pages a test covers, and 雰囲気 is the atmosphere of a place.

Used in 囲む (kakomu, to surround), 範囲 (han'i, range/scope), and 雰囲気 (fun'iki, atmosphere)

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Readings from KANJIDIC2, © EDRDG, CC BY-SA.