coast

the shore of a sea or ocean

a slope down which sleds may coast; "when it snowed they made a coast on the golf course"

the area within view; "the coast is clear"

the act of moving smoothly along a surface while remaining in contact with it; "his slide didn't stop until the bottom of the hill"; "the children lined up for a coast down the snowy slope"

move effortlessly; by force of gravity