徹(てっ)するto penetrate, to sink in, to devote oneself (to), to do intently and exclusively, to do throughout (e.g. the night)

家業(かぎょう)に徹(てっ)する兄(あに)はカッコイイです。

My brother, who devotes himself to the family business, is cool. {to penetrate, to sink in, to devote oneself (to), to do intently and exclusively, to do throughout (e.g. the night)}

親友(しんゆう)と夜(よる)を徹(てっ)して人生(じんせい)について語(かた)り合(あ)った。

I spent the entire night discussing life with my best friend. {to penetrate, to sink in, to devote oneself (to), to do intently and exclusively, to do throughout (e.g. the night)}

映画(えいが)を作(つく)るためには裏方(うらかた)に徹(てっ)する人々(ひとびと)が必要(ひつよう)だ。

In order to make a movie, we need people who are willing to devote themselves entirely to behind-the-scenes work. {to penetrate, to sink in, to devote oneself (to), to do intently and exclusively, to do throughout (e.g. the night)}

神(かみ)に酷(ひど)い状況(じょうきょう)から救(すく)われてから、信仰(しんこう)に徹(てっ)するようになりました。

After being saved from a terrible situation by God, I began to devote myself to faith. {to penetrate, to sink in, to devote oneself (to), to do intently and exclusively, to do throughout (e.g. the night)}

昼夜(ちゅうや)を徹(てっ)して工事(こうじ)を行(おこな)えばこそ、短期間(たんきかん)でのリフォームが可能(かのう)になるのだ。

Only by devoting oneself to construction day and night, can a renovation be completed in a short period of time. {to penetrate, to sink in, to devote oneself (to), to do intently and exclusively, to do throughout (e.g. the night)}