研ぐ とぐ togu to sharpen JLPT N1 godan verb Common word Other meanings 2. to wash (rice) 3. to scour, to polish, to burnish The kanji in this word 研 polish, study of, sharpen JLPT N4 · Strokes 9 In this level トーン とかく 咎める 時折 途切れる 特技 独裁 特産 独自 特集 Back to the JLPT N1 list Practise these words