Answer:

serene

AnswerCrossword Clue
SERENEContented
SERENEPlacid
SERENEUnruffled
SERENETranquil
SERENEAt peace
SERENEQuietly composed
SERENECalm
SERENEUntroubled
SERENEComposed
SERENEUnflappable
SERENEImperturbable
SERENEPeaceful
SERENECollected
SERENEPacific
SERENEWorry-free
SERENECool and collected
SERENEStill
SERENECool
SERENECalm and collected
SERENECalm, cool, and collected
SERENEExtremely peaceful
SERENECalm as can be
SERENELaid-back
SERENEUnperturbed
SERENEUndisturbed
SERENEMajestic
SERENEBlissful
SERENEWorry free
SERENENot agitated
SERENECompletely calm
SERENEDreamy
SERENEFree from agitation
SERENEEasygoing
SERENEAnxiety-free
SERENECool and calm
SERENEQuite calm
SERENERoyal epithet
SERENEFeeling calm
SERENECool as a cucumber
SERENEQuiet