用(よう)を足(た)すto take care of some business, to go on an errand, to relieve oneself, to do one's business, to go to the toilet

用(よう)を足(た)すためにスーパーへ行(い)きました。

I went to the supermarket to take care of some business.

父(ちち)は１０分以上(じゅっぷんいじょう)もトイレで用(よう)を足(た)しています。

My father has been taking care of some business in the toilet for more than 10 minutes.

用(よう)を足(た)すために便所(べんじょ)へ行(い)ったが、行列(ぎょうれつ)ができていた。

I went to the toilet to take care of some business, but there was a line.

一度(いちど)家(いえ)を出(で)るだけで全(すべ)ての用(よう)を足(た)す事(こと)ができればよかったのに。

It would have been nice if I could have taken care of everything just by leaving the house once.

息子(むすこ)はもう５歳(ごさい)なのに一人(ひとり)で用(よう)を足(た)す事(こと)ができず、まだおむつを履(は)いている。

My son is already five years old, but he still can't relieve himself on his own and is still wearing diapers.