Answer: serene

AnswerCrossword Clue
SERENELike Zen gardens
SERENEPart of H.S.M.
SERENEBalmy; halcyon
SERENECool, calm and collected
SERENETrouble-free
SERENECalm or tranquil
sereneclear; fair
serenepeaceful; calm
sereneto tranquillize / calm, tranquil
SERENEUnfazed
SERENEBalmy
SERENEFree of worries
SERENESuper-calm
SERENEChilled out
SERENECalm, cool and collected
SERENECalm and unruffled
SERENEUnflustered
SERENEFar from flustered
SERENEConducive to meditation
SERENEPastoral
SERENEPart of a prince's title.
SERENEPart of H. S. H.
SERENEQuiet.
SERENELike still waters.
SERENEUnclouded.
SERENEPart of H.S.H.
SERENEExalted: Used in titles of European royal families.
SERENEAbove the strife.
SERENEUndisturbed.
SERENEPacific.
SERENEMost high, in titles
SERENEWord in a royal title.
SERENEHalcyon
SERENERoyal kind of highness
SERENEKind of highness
SERENEAugust
SERENEUnclouded
SERENE" . . . gem of purest ray ...": Gray
SERENEInexcitable
SERENELacking uproar