The wind is what causes a sailboat to sail.
Sailboat is to sail as kite is to fly, just as airplane is to wing and oil tanker is to engine.
Yes, sailboat is a compound word. (sail + boat = sailboat)
A sailboat without a sail is but a hull of itself.
It is called the lateen sail.
It is a part of the sail.
Collects wind, it is a triangular sail placed at the front of the sailboat.
Um.........you just said the answer. its called a sail
A sailboat can certainly be operating under sail at night. Sailboats use their sails when there is enough wind to carry them.