plug
noun
°(electricity) A pronged connecting device which fits into a mating socket.
"I pushed the plug back into the electrical socket and the lamp began to glow again."
°Any piece of wood, metal, or other substance used to stop or fill a hole; a stopple.
"Pull the plug out of the tub so it can drain."
verb
°To stop with a plug; to make tight by stopping a hole.
"He attempted to plug the leaks with some caulk."
°To blatantly mention a particular product or service as if advertising it.
"The main guest on the show just kept plugging his latest movie: it got so tiresome."