Answer: PLACID

AnswerCrossword Clue
PLACIDEven-tempered
placidcalm; serene
placidcalm in nature
PLACIDNot having so much as a ripple
PLACIDOpposite of turbulent
PLACIDLake name of two Olympics
PLACIDPeaceful
PLACIDN. Y. lake.
PLACIDNew York lake.
PLACIDUnruffled.
PLACIDTranquil.
PLACIDLake ..., noted sports center.
PLACIDTartan
PLACIDUndisturbed
PLACIDLake ... (Olympic site)
PLACIDSerene
PLACIDNot choppy
PLACIDLake ...: '80 Olympics site
PLACIDCalm
PLACIDLake ... (1980 Olympics site)
PLACIDAdirondacks lake
PLACIDUnruffled
PLACIDLake .., 1980 Winter Olympics town
PLACIDTranquil
PLACIDAdirondack lake
PLACIDStill
PLACIDQuiet