suru verb (special), intransitive verb
penetrate; sink in; be understood deeply
Used when an idea, feeling, or realization deeply penetrates one's mind or heart; often in the form 心に徹する or 骨身に徹する.
彼の言葉が心に徹した。
His words sank deep into my heart.
寒さが骨身に徹する
The cold penetrates to the bone.
suru verb (special), intransitive verb
devote oneself; do intently; be absorbed in
Expresses single-minded dedication to an activity; often used with ～に徹する, e.g., 研究に徹する.
彼は研究に徹している。
He devotes himself entirely to his research.
彼女は仕事一筋に徹するタイプだ。
She is the type who throws herself completely into her work.
suru verb (special), intransitive verb
do throughout; do all night
Used when an activity is carried on continuously through a period, especially overnight; common in phrases like 夜を徹する or 一晩中徹する.
彼らは夜を徹して議論した。
They discussed all through the night.
試験前は徹夜で勉強する学生も多いが、夜を徹するのは体に良くない。
Many students study all night before exams, but staying up all night is not good for your health.