勢い良く いきおいよく vigorously Meanings いきおいよく · いきよいよく also 勢いよく adverb vigorously; with great force; energetically; enthusiastically; with spirit Its kanji 勢 セイ、ゼイ · いきお.い、はずみ forces, energy, military strength 良 リョウ · よ.い、-よ.い、い.い、-い.い good, pleasing, skilled In sentences Furigana ドアがパッと勢いきおい良よくあいた。 The door burst open. #201910