用|ようyou[1]atamadaka (head-high)

1. nounbusiness; task; errand; engagement
   何なんの用ようでここに来きたのですか。↗

   What has brought you here?
2. nounuse; purpose
3. noun (suffix)for the use of ...; used for ...; made for ...
   それから服ふくを着きて、講義こうぎ用ようのメモを手てさげ鞄かばんに詰め込つめこみ、階段かいだんを駆け下かけおりた。↗

   Then he got dressed, stuffed his lecture notes into his briefcase, and ran down the stairs.
4. nouncall of nature; excretion

• Synonym用事ようじNeutralThings you have to do, as in 「用事がある」; the most common choice in speech. 「用」 on its own is just a shorter, terser way to say it.
• Synonym用件ようけんNeutralThe content of the business at hand, as in 「ご用件は何ですか」; it stresses what the matter actually is, more than 「用」 does.
• Synonym所用しょようWrittenWritten-style word for having business to attend to; typically seen as 「所用で外出」.
• Synonym用向きようむきNeutralThe purpose of someone's visit, as in 「用向きを伺う」; a somewhat old-fashioned word.
• Related使い道つかいみちCasualWhat a thing can be used for or how, as in 「使い道がない」; colloquial.
• Related用途ようとNeutralWhat an object or money is used for, as in 「用途別」.
• Related効用こうようWrittenThe effect or benefit something gives, as in 「薬の効用」; written-style, and it focuses on how well something works.
• Related用法ようほうNeutralHow something is used, as in 「用法・用量」 or 「語の用法」; typical with medicines and words.
• Related入り用いりようCasualWhat you need for something, or the money it takes, as in 「入り用なものを揃える」; colloquial.
• Related入用にゅうようCasualThe same word as the entry above; 「入用」 is merely an alternate spelling. Also covers required outlays, as in 「何かと入り用だ」.
• Antonym無用むようWrittenThe opposite of 「用」: not needed or of no use, as in 「心配無用」; written-style.

Say 「用」 for a quick word covering business or use. For things you must do, 「用事」; for the content of the matter, 「用件」. For what something is used for, 「用途」 or 「使い道」; for how to use it, 「用法」. For 'not needed', 「無用」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. （ヨウ）用事ようじ、用件ようけん。
2. （ヨウ）有用ゆうようであること、有用性ゆうようせい。役やくに立たつこと。
3. （ヨウ）用途ようと。その用途ようとに使つかうもの。