Dictionary/不ふFuJLPT N3不 (Fu) is a Japanese prefix meaning “un-, non-”.Meaningsprefixun-; non-Kanji in 不不negativeRelated words不安anxiety不味いbad(-tasting)相変わらずas usual不思議wonderful不倫adultery不利disadvantage不幸unhappiness不正injustice不可能impossible不満dissatisfaction不明unclear無礼rudeness