tranquility; calmness; serenity; quietness
Describes a state of peace and quiet, often used for weather, sea, or atmosphere. Can be used as a noun or na-adjective.
The sea was calm, without a single wave.
静穏な日々が続いている。
Peaceful days continue.
静穏 is a literary word for tranquility often used of weather or a place, while 沈静 emphasizes the process of a disturbance dying down, frequently as 沈静する.
Compound of 静 (still, quiet) and 穏 (calm, peaceful). The reading せいおん is the on'yomi of both characters.