calmness
US /ˈkɑːm.nəs/
UK /ˈkɑːm.nəs/

1.
calma, serenidad, tranquilidad
the state of being peaceful, quiet, and without worry
:
•
She found a sense of calmness in nature.
Ella encontró una sensación de calma en la naturaleza.
•
Despite the chaos, he maintained his calmness.
A pesar del caos, mantuvo su calma.