tranquil
adjective uk/ˈtræŋ.kwɪl/ us/ˈtræŋ.kwəl/
C1 安静的，平静的;安宁的
calm and peaceful and without noise, violence, worry, etc.
She stared at the tranquil surface of the water. 她凝视着平静的水面。
The hotel is in a tranquil rural setting. 宾馆周围是静谧的乡村。
A spasm of pain crossed his normally tranquil features. 一阵疼痛掠过他那平时平静的脸庞。