tranquility; peace and calm
Formal, literary word for deep stillness or peace, often used for the world, society, or a solemn atmosphere. Not everyday conversational Japanese.
世界の静謐を願う。
I wish for peace in the world.
境内は静謐な空気に包まれていた。
The temple grounds were wrapped in a tranquil atmosphere.
From Middle Chinese-derived kanji 静 (quiet) and 謐 (calm, peaceful). The exact historical derivation is uncertain, but the word has been used in literary Japanese for centuries.