We call pants pants. You call "underpants" or "underwear" pants. Trousers are pair of pants. Each half is a pant leg. Pants. Kind of like how it's a pair of scissors. Each "knife" is a scissor, just as each leg is a pant. You put two together, and you get a pair of scissors, or a pair of pants.
As for the call and write comparison, I was using the word, not like a shorthand for a phone call, but like "I'll call to him" as if he were in the back yard.
Entree? That makes sense. Apparently, "entree" got it's start as the "entry" to the meal...however, as meals changed, this is where NA and Eupore split their meanings. The meals of previous centuries began with a large communal dish...a large roast, a whole turkey, etc. This was both the main, and beginning of the meal. As this form of meal died out in favor of a staggered meal where the "main course" was later in the meal, the Europeans decided to still call the "entry" to the meal (the appetizer) the "entree" whereas the Americans used the term to describe the 1/2 of the concept of it being the main course. Realizing that the word means "entry" I think it does make more sense that it be the appetizer, but the American usage isn't without merit. But I agree that it doesn't make as much sense.
As for math vs maths....maths makes sense as it's short for mathematics...but anything that ends in "___ths" just sounds weird. Not saying it's wrong...just sounds weird..
Bathroom/restroom/facilities/lavatory: a) One doesn't always need a toilet, one just may be using the bathroom to shoot-up, to re-apply a fresh coat of deodorant, replacing a maxi pad, wiping their ass sweat, checking make-up, washing their hands before a meal, or trying to find a date under the wall of the bathroom stall. It's no business of the party to know why you need the use of the room. b) I don't want to know what you're doing in there. There are many reasons one might need to use it, I don't need to know that your diarrhea is kicking in again when we've just sat down for dinner. None of the names for the particular room are really all that good, either. Water Closet? really? Must have lost something in the translation. When I hear "water closet" I imagine a small pantry/linen closet that holds those big 5 gal bottles of water. Bathroom? Hmm...well, if it's a "half bath" you'll only be taking a sponge bath. Restroom? Not all that restful, although if you've got kids your time in there may be the only rest you get. Lavatory is too much like Laboratory. I always imagine test tubes and bunsen burners. Loo? Are you serious? WTF is that? It's just slang.
That's a good one.