徹する てっする tessuru to penetrate JLPT N1 suru verb Common word Other meanings 2. to devote oneself (to), to do intently and exclusively 3. to do throughout (e.g. the night) The kanji in this word 徹 penetrate, clear, pierce JLPT N1 · Strokes 15 In this level デコレーション 手近 てっきり 鉄鋼 デッサン てっぺん 鉄棒 出直し 手のひら 手配 Back to the JLPT N1 list Practise these words