To moor is to tie up a ship, as in to moor the ocean liner to the docks. Or, if you're reading Victorian literature, a moor could be a mossy meet-up spot.
This word of many hats can also be a noun — a moor is mossy land covered in bushes and grass. The spooky dogs in Sherlock Holmes's The Hound of the Baskervilles lurk in the moor. With a capital "M," a Moor refers to a person descended from Muslims of northwestern Africa. It's usually used as a verb, though, meaning "to fasten a boat" — probably related to the Old English word mærels, "mooring rope." Say the word in a deep voice and it almost sounds like the foghorn on a ship that's about to moor in the harbor on a foggy night.