Answer: calm

AnswerCrossword Clue
CALM... before the storm
CALMSailor's nightmare
CALMPeace and quiet
CALMRepose
CALMNot at all excited
CALMRelaxed
CALMCollected
CALMLike the eye of a storm
CALMPacific
CALMUnflappable
CALMCool
CALMDevoid of wind
CALMPre-storm status
CALMStorm preceder
CALMWaveless
CALMPartner of cool and collected
CALMAppease
CALMPre-storm period, perhaps
CALMStill
CALMHalcyon
calmto make or become calm
CALMNot stormy
CALMNot windy
CALMPre-storm period
CALMPrecedes a storm
CALMAt peace
CALMTranquil
CALMUnruffled
CALMBane for sailors
CALMStorm's eye, e.g.
CALMWindless
CALMComposed
CALMTranquil, as seas
CALMTime before a storm
CALMChilling, so to speak
CALMHard to rattle
CALMSettle down
CALMStress-free
CALMPacify
CALMRelax