徹夜

• 読み: てつや
• ローマ字: tetsuya
• 漢字の分解: 徹 (tetsu) — penetrate, go through; 夜 (ya) — night
• 発音: /te.tsɯ.ja/

意味

Staying up all night; an all-nighter; a sleepless night.

A noun that also functions as a suru verb (徹夜する, to stay up all night). Very common among students and workers: 徹夜で勉強する (study all night), 徹夜明け (the morning after an all-nighter). Can also be used as a no-adjective: 徹夜の作業 (all-night work). Carries a somewhat casual, relatable tone — almost everyone has experienced it.

例文

1. 試験前に徹夜で勉強した。
2. 徹夜明けで頭がぼんやりしている。
3. 締め切りに間に合わせるために徹夜した。

使い方ガイド

場面: student life, work, daily life

トーン: informal

起源と歴史

Compound of 徹 (tetsu, to penetrate/go through) and 夜 (ya, night). Together, 'going through the night' — staying awake from evening to morning without sleeping.

文化的背景

時代: Modern

世代: Young adults

社会的背景: Universal