軌 means “track, rut, orbit”

き · ki

Also: wheel, model

On'yomi (Chinese reading)
キ

JLPT N1 · Taught in secondary school · 9 strokes

The story

A cart (車) and nine (九): picture the ruts a cart's wheels wear into a dirt road. 軌 is a track: satellites follow a 軌道, orbit, a business 軌道に乗る when it gets on track, and 常軌を逸する is to go right off the rails.

Used in 軌道 (kidou, orbit/track), 軌跡 (kiseki, trajectory/path), and 常軌 (jouki, normal course)

More from Routes & Returns

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