In American English this is the ordinary spelling of the word British books write as rigour. It names a hard, unsoft kind of strictness.

In American English在美式英文裡 this is the ordinary spelling of the word這是那個字的一般拼法 British books write as rigour英式書裡寫成rigour的。It names it指的是 a hard, unsoft kind of strictness一種強硬、不軟化的嚴格。

In school and work talk, academic rigor means the work is careful and demanding, not easy or sloppy. People also use it for a harsh stretch of life: the rigor of training, the rigor of winter.

In school and work talk在講學校或工作的場合, academic rigor meansacademic rigor（學術上的嚴謹）代表 the work is careful and demanding這份工作做得謹慎又要求高, not easy or sloppy不是隨便或鬆散的。People also use it for a harsh stretch of life大家也會拿它來形容人生中艱苦的一段: the rigor of trainingthe rigor of training（訓練的嚴苛）, the rigor of winterthe rigor of winter（冬天的嚴酷）。

It feels a little formal; in everyday speech people more often say strict or tough.

It feels a little formal它感覺有點正式; in everyday speech people more often say strict or tough在日常說話裡，大家更常說strict或tough。

Though actually, even in Britain the Latin phrase rigor mortis (the body going stiff after death) keeps this spelling — they do not write rigour mortis. And the adjective is rigorous on both sides of the ocean, with no extra u.

Though actually不過其實, even in Britain就算在英國 the Latin phrase rigor mortis拉丁文詞組rigor mortis (the body going stiff after death)（人死後身體變僵硬） keeps this spelling也保留了這種拼法 — they do not write rigour mortis他們不會寫成rigour mortis。And the adjective is rigorous on both sides of the ocean而形容詞rigorous在兩邊都是這樣拼, with no extra u沒有多一個u。