要(よう)

よう

noun, prefix

need, necessity

See also: 要(よう)する (verb form)

1. need, necessity, requirement

Something that is needed or required. Often used as a prefix meaning 'requiring' or 'needing'.

要(よう)加熱(かねつ)。

Requires heating. (Needs to be heated.)

Common food label

要(よう)予約(よやく)。

Reservation required.

要(よう)冷蔵(れいぞう)と書(か)いてあったので、冷蔵庫(れいぞうこ)に入(い)れた。

It said 'requires refrigeration,' so I put it in the refrigerator.

要(よう) is commonly used as a prefix meaning "requires" or "needs."

Compounds

要(よう)加熱(かねつ): requires heating
要(よう)冷蔵(れいぞう): requires refrigeration
要(よう)予約(よやく): reservation required
要(よう)確認(かくにん): confirmation required
要(よう)注意(ちゅうい): caution required
要(よう)相談(そうだん): consultation required

Similar words

不要(ふよう): unnecessary, not required
必要(ひつよう): necessity, need (more commonly used as a standalone word)
要求(ようきゅう): demand, requirement

Related Words

Antonym: 不要(ふよう) (unnecessary)

Related: 必要(ひつよう) (necessity (standalone word))

general

Added 2026.2.4 22:51 · Revised 2026.10.13 22:52

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