The noun tranquility means a state of calm or quietude.

Synonyms are peace, coolness, serenity, or placidity.

The word origins from Old French (12th century) tranquilite meaning “peace, happiness”, and Latin tranquillitatem meaning “quietness, stillness; serenity”, from tranquillus meaning “quiet, calm, still”.

It was located in an atmosphere that offers tranquility and comfort.

They ate in silence then, enjoying the tranquility of the wonderful nature.

I’m looking for the tranquility of the countryside.