てっ 徹する Common word JLPT N1 Play audio LinksSentence search for 徹するSentence search for てっするKanji details for 徹Edit in JMdict Suru verb - special class1. to penetrate; to sink in2. to devote oneself (to); to do intently and exclusively3. to do throughout (e.g. the night) Discussions Log in to talk about this word.