止 means “stop”

とまる · tomaru

Also: halt

Kun'yomi (Japanese reading)
とまる, とめる, とどめる, とどめ, とどまる
On'yomi (Chinese reading)
シ

JLPT N4 · Taught in grade 2 · 4 strokes

The story

A footprint planted on the ground: the foot that goes no further. Painted huge in white on every Japanese street, 止まれ commands what the pictograph always showed: stop here.

Used in 止まる (tomaru, to stop), 止める (tomeru, to stop something), and 中止 (chuushi, cancellation)

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