いせい 威勢がいい LinksSentence search for 威勢がいいSentence search for いせいがいいSentence search for 威勢が良いSentence search for いせいがよいSentence search for 威勢がよいKanji details for 威 and 勢Edit in JMdict Expressions (phrases, clauses, etc.), I-Adjective (keiyoushi) - yoi/ii class1. vigorous; cheerful; assertiveOther forms威勢が良い 【いせいがいい】、威勢が良い 【いせいがよい】、威勢がよい 【いせいがよい】 Discussions Log in to talk about this word.