We hoist when we send something up, with effort. The notion of effort is very important, because we will say"send a flag" - and not hoist a flag - because it does not require effort. "The mainsail is hoisted because it is heavy and needs help - winch or hoist.
Thus one hoists a sail, a boat on its davits, a man with the mast... To hoist, one uses a common maneuver (rope) called halyard.
The opposite of hoisting is: lowering. Lowering means letting your weight drop. A sail is lowered, but also the trawl fishing or the fish in the hold. When you want to speed up the maneuver, you can say"Sink big" which means"drop it as fast as you can".
Lowering means lowering down, so you lower your pants to go to the bathroom! And"to slouch" means to wallow either voluntarily (on a chair) or clumsily while falling:"The moss has slumped again on the deck..."
