戒 / commandment

Kanji for commandment.

Readings

Type	Reading	Notes
On (音)	カイ	Sino-Japanese readings — common in compounds.
Kun (訓)	いまし.める	Native Japanese readings — common standalone or with okurigana.

戒 carries the meaning commandment.

戒告かいこくadmonition / warning / caution

訓戒くんかいwarning / admonition / lesson or a phrase that teaches you not to do something

戒めるいましめるto warn against / to caution against

警戒けいかいvigilance / caution / alertness