I believe Galini is the Greek word for calmness and serenity, although im not 100% sure.
The Greek symbol for serenity is typically represented by the letter ψ, which is the Greek letter psi. It is often used to symbolize peace, tranquility, and calmness.
γαλήνη (galini)
Serenity
serenity in... Italian-serenità, Spanish-serenidad, French-sérénité
F-i-l-e-m-u (peacefulness/serenity)
to say serenity in Japanese is 静穏and is read like seion hope this helps :)
Serenidad
I would say no!
Pig Latin for serenity is err-enity-say.
Serenity Now
Casa de la serenidad.
You may say 'shizuka' or 'heiwa.'