ゆいいつ 唯一 Common word JLPT N3 Wanikani level 49 LinksSentence search for 唯一Sentence search for ゆいいつSentence search for ゆいつSentence search for ゆういつKanji details for 唯 and 一Edit in JMdict Noun which may take the genitive case particle 'no', Noun, Adverb (fukushi)1. only; sole; uniqueOther forms唯一 【ゆいつ】、唯一 【ゆういつ】Notesゆういつ: Irregular kana usage. Discussions Log in to talk about this word.