‘安寝’ is a formal, literary verb meaning ‘to retire to bed peacefully’ or ‘to rest calmly for the night.’ The character 安 (ān) means ‘peaceful,’ ‘safe,’ or ‘calm,’ while 寝 (qǐn) means ‘to sleep’ or ‘bedroom’ — together they evoke the idea of settling into rest with tranquility and security. Unlike everyday terms like 睡觉 (shuì jiào), 安寝 carries classical elegance and is often used in written Chinese, formal announcements, historical narratives, or respectful contexts such as bedtime wishes to elders.

This phrase emphasizes not just physical sleep but the mental and environmental calm that precedes it — quiet surroundings, emotional ease, and proper preparation for rest. It’s rarely used in casual speech among friends or children; instead, it appears in literature, ceremonial language (e.g., imperial edicts or temple inscriptions), and modern formal writing to convey dignity and serenity. Its tone is gentle yet solemn, making it suitable for describing dignified, unhurried bedtime routines.