se ‧ rene /səˈriːn, sɪˈriːn/ BrE AmE adjective
[ Date: 1400-1500 ; Language: Latin ; Origin: serenus 'clear, calm' ]
very calm or peaceful:
The child’s face was serene and beautiful.
a serene mountain lake
—serenely adverb
—serenity /səˈrenəti, sɪˈrenəti/ noun [uncountable]