Toilet
Restroom, Bathroom
noun
*Ahem.* This is the place of convenience. What place above all others do you want to be convenient? Just in case, you know... that would be the toilet. You might also call it the lavatory, the restroom, or the bathroom.
This word is casual and sounds gruff, so you won't see it on offical signs or hear it in polite conversation. It's worth knowing so that you'll understand it in casual speaking and writing, though.
This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well. Just watch out for the rendaku.
便所のにおい
toilet smell
便所の出入り口
bathroom entrance
便所のドア
toilet door
へをこく時は便所に行けよ。
You should go to the bathroom when you fart.
サトシ、ようやく便所そうじのスイッチが入ったみたいだね。
It seems that Satoshi finally got serious about cleaning the bathroom.
よっしゃ！完璧なシュートが決まったぜ！俺、ここの便所のバスケットゴール付きのゴミ箱めっちゃ好きだわ。
Oh yeah! Nothing but net! I really love that this restroom’s trashcan has a basketball net on it.