JMdict: 1914780

用を足す 【ようをたす】

  1. [exp,v5s] to take care of some business; to go on an errand
  2. [exp,v5s] to relieve oneself; to do one's business; to go to the toilet
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Kanji in this word:

Kanji Meanings On Readings Kun Readings
用 Utilize, Business, Service, Use, Employ ヨウ もち.いる
足 Leg, Foot, Be Sufficient, Counter For Pairs Of Footwear ソク あし, た.りる, た.る, た.す