Crossword clues for Most serene:SERENEPeacefulSERENEMajesticSERENEWorry freeSERENECool and collectedSERENEStillSERENENot easily ruffledSERENITY__ now!: "Seinfeld" mantra spoken by Frank CostanzaSERENETotally at easeSERENETranquilSERENERMore at peaceSERENEPlacidSERENEBlissfulSERENERMore tranquilSERENEAt peaceSERENEUnruffledSERENERMore chillSERENEComposedSERENEQuietly composedSERENEContentedSERENECalmSERENEExtremely chillSERENEFairSERENEExuding peaceSERENELike a spa environment, you'd hopeSERENEIn the middle of meditation, if you're doing it rightSERENERContemptuous lookerSERENELike a lazy riverSERENETotally chillSERENECoolSERENECool as a cucumberSERENELYIn a calm waySERENECalm and collectedSERENECalm, cool, and collectedSERENEExtremely peacefulSERENELYIn peaceSERENITIESUnflustered statesSERENEUntroubledSERENECalm as can beSERENEUnflappableSERENEPacificSERENELaid-backSERENERLess agitatedSERENITYPeaceSERENEImperturbableSERENEUnperturbedSERENELYIn a calm mannerSERENEUndisturbedSERENEType-BSERENEChillSERENECompletely calm