Calm, peaceful, and untroubled.

• Free from worry; composed.

平静、安宁、不受干扰。

• 无忧无虑；镇定自若。

Clear and unclouded, as of the sky or weather.

晴朗无云（指天空或天气）。

Used in certain honorific titles, e.g., His Serene Highness.

用于某些君主或贵族的尊称头衔。

To make calm or peaceful.

• To soothe; to render untroubled.

使平静或安宁。

• 安抚；使不受扰乱。

Serenity; calmness.

• Clearness or tranquility.

宁静；平和。

• 清澈或安定。