凝らす こらす korasu to concentrate JLPT N1 godan verb Other meanings 2. to stiffen, to become tense The kanji in this word 凝 congeal, freeze, stiff JLPT N1 · Strokes 16 In this level 込める コメント こもる 固有 暦 ご覧なさい 孤立 懲りる 凝る 根気 Back to the JLPT N1 list Practise these words