• 時間じかん — time / hour
• 時代じだい — era / age
• 時期じき — season / period
• 一時いちじ — one o'clock / for a time
• 時々ときどき — sometimes
• 時差じさ — time difference

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時 is used to mark both exact clock times and broader concepts like eras and timing. It’s a foundational kanji for discussing life, schedules, and history.