serenity serenity /sɝˈɛnəti/

noun

1. () A disposition free from stress or emotion  ( placidity , quiet , repose , tranquillity , serenity , tranquility [ N. American] )
   a disposition free from stress or emotion
   
2. () The absence of mental stress or anxiety  ( ataraxis , heartsease , peacefulness , repose , peace , peace of mind , serenity )
   the absence of mental stress or anxiety
     The serene landscape provided a sense of peace and tranquility.
   The serene landscape provided a sense of peace and tranquility.