serene

US /səˈriːn/
UK /səˈriːn/
"serene" picture
1.

spokojny, pogodny, bezchmurny

calm, peaceful, and untroubled; tranquil

:
The lake was serene in the early morning light.
Jezioro było spokojne w świetle wczesnego poranka.
She had a serene expression on her face.
Miała spokojny wyraz twarzy.