par·a·sail 
(părə-sāl′)
(părə-sāl′)n.
A parachute that is designed with openings or extensions to allow airflow and is towed behind an automobile or motorboat to lift a rider attached by a harness into the air.
intr.v. par·a·sailed, par·a·sail·ing, par·a·sails
To be pulled into the air while harnessed to such a parachute.
[PARA(CHUTE) + SAIL.]
para·sail′er n.
parasail