Answer:

staid

AnswerCrossword Clue
STAIDBoringly proper
STAIDUnadventurous
STAIDFar from wild
STAIDSerious-minded
STAIDSerious
STAIDReserved in manner
STAIDRather conservative
STAIDButton-down
STAIDConservative
STAIDRestrained
STAIDUnflashy
STAIDNot flighty
STAIDSober
STAIDSobersided
STAIDStrait-laced
STAIDSettled
STAIDCalm
STAIDComposed
STAIDOpposite of wild
STAIDNot wild
STAIDDignified
STAIDSubdued
STAIDHardly cutting-edge
STAIDSedate
STAIDFar from flighty
STAIDHardly flighty
STAIDSober-minded
STAIDStraitlaced
STAIDNot adventurous
STAIDReserved