1) What do you mean by sail extender? The rope to hoist (raise) the sail is called the halyard. The vertical beam supporting the sail is the mast, the horizontal beam supporting the sail is the boom.
2) It's called a SPRIT - see: Dictionary.com
Extender
It is called the lateen sail.
Um.........you just said the answer. its called a sail
Yes, there is a such thing as a wifi extender, but they are typically called wifi boosters. They act as simple relay devices when transmitting a signal over long distances.
A sail boat or yacht.
Um.........you just said the answer. its called a sail
Making the sail area smaller is called reefing.
Tom sail on a ship called DO
A steering wheel on a sail boat is still called a steering wheel.
Probably a cord extender. By the way, it's "Xbox" not "exbox".
"Reefing the sails" reduces the area of sail.
the pole that holds up the sail is called the mast