無・无|むmu[1]atamadaka (head-high)

1. nounnothing; naught; nought; nil; zero
   無むから有ゆうは生しょうじない。↗

   Nothing comes from nothing.
2. prefixun-; non-

• SynonymなしNeutralEveryday word for 'none/without' (「異常なし」) and for rejecting something (「それはなしだ」); common in speech. 「無」 is more abstract and belongs to written style.
• Synonym皆無かいむNeutralComplete absence, used as a predicate (「経験は皆無だ」). 「無」 mostly appears as a prefix or as the abstract concept.
• SynonymゼロNeutralThe full-width digit ０, same referent as 「零」; used in counting and reading numbers. It only overlaps with 「無」 in the zero sense.
• Related零れいNeutralThe number zero, used mainly for reading figures aloud and in kanji notation. 「無」 is the state of there being nothing at all, not a numeral.
• Related絶無ぜつむWrittenRare, written-style word for a complete absence of something. In everyday speech say 「皆無」 or 「全くない」 instead.
• Related0NeutralThe digit zero, used in counting and reading numbers (「0点」). 「無」 is philosophical nothingness or the prefix 「無～」, not a numeral.
• Antonym有ゆうWrittenWritten-style antonym meaning existence or having; paired with 「無」 in compounds like 「有無」.
• AntonymありNeutralNeutral antonym: 'there is' or 'acceptable' (「それもありだ」); in tables and lists it stands opposite 「無」.

「無」 covers abstract nothingness and the prefix 「無～」; 「なし」 is the everyday word for 'none/without'; 「皆無」 means complete absence; 「零」 and 「ゼロ」 are the number zero. The opposites are 「有」 and 「あり」.

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

1. （ム）存在そんざいの対立たいりつ概念がいねん。何なんもない状態じょうたい。不存在ふそんざい。哲学てつがくや宗教しゅうきょうにおいて根本的こんぽんてきなテーマとなる。類似るいじの概念がいねんに「空そら」がある。
2. （ム）無駄むだ。無意義むいぎ。
3. ないことを表あらわす。