命 means “life, fate, command”

いのち · inochi

Also: decree, destiny

Kun'yomi (Japanese reading)
いのち
On'yomi (Chinese reading)
メイ, ミョウ

JLPT N3 · Taught in grade 3 · 8 strokes

The story

Order (令) with a mouth (口): a command spoken aloud, and the oldest command of all, the life you are given. 命 is life itself, 運命 is fate, and 一生懸命, "staking your life", means giving something everything you have.

Used in 命 (inochi, life), 運命 (unmei, fate), and 一生懸命 (isshoukenmei, with all one's might)

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