serene

adjectives

not agitated; without losing self-possession
"spoke in a calm voice"; "remained calm throughout the uproar"; "he remained serene in the midst of turbulence"; "a serene expression on her face"; "she became more tranquil"; "tranquil life in the country"
calm, serene, tranquil, unagitated
completely clear and fine
"serene skies and a bright blue sea"
serene
is similar to
free from clouds or mist or haze
"on a clear day"
clear