長 means “long”

ながい · nagai

Also: leader, superior, senior

Kun'yomi (Japanese reading)
ながい, おさ
On'yomi (Chinese reading)
チョウ

JLPT N5 · Taught in grade 2 · 8 strokes

The story

An elder with flowing hair: wisdom grows with the long passage of years, like a river stretching to the sea.

Means "long" or "chief/leader"; used in 長い (nagai, long) and 社長 (shachou, company president)

Words with 長

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