本腰 ほんごし Meanings Noun strenuous effort; earnestness; seriousness Kanji 本 origin. Read as ホン. 腰 waist. Read as こし. Common phrases 本腰を入れる (ほんごしをいれる) to set about in earnest Words containing 本腰 本腰を入れる (ほんごしをいれる) to set about in earnest Jinuma: Japanese Dictionary · Word lists