Here's some that can be confusing for those whose English is a second language... Quicksand can work slowly, boxing rings are square, the Guinea Pig is neither from Guinea nor is it a pig. Why is it that writer's write but fingers don't fing, grocers don't groce, and hammers don't ham? If the plural of tooth is teeth, why isn't the plural of booth, beeth? One goose, two geese. So why not one Moose, two Meese? Is cheese he plural of choose? One mouse, two mice; one louse, two lice, one house two hice? If teachers once taught, why didn't preachers praught? If a vegetarian eats vegetables, what does a humanitarian eat? Even tougher, why do people recite at a play but play at a recital? Why do we "ship" by truck or car, and send "cargo" by ship? Why do we have noses than run, and feet that smell, park on driveways and drive on parkways? How can a fat chance and a slim chance be the same while a wise man and a wise guy are opposites? How can the weather be hot as heck on one day and cold as heck on another? When a house burns up it burns down? You fill in a form by filling it out? You get in and out of a car but on and off a bus? When the stars are out they are visible, but when the lights are out they are invisible? And why, when I wind up my watch I start it, but when I wind up this post, I end it? Pity the poor immigrant. How can he learn a language which in itself doesn't know if it coming or going??