Inexcusable is for behaviour that is too bad to excuse. You have run out of reasons.

Inexcusable is for behaviourInexcusable是用在行為上，that is too bad to excuse糟到無法被原諒的行為。You have run out of reasons已經找不出理由來開脫了。

Being late once can be excused; lying to cover it, or hurting someone on purpose, can be inexcusable. It is a strong, judging word, used by adults, news writers, and anyone who wants to say “this is not all right, and please do not try to explain it away.” It is about what someone did, not about a small slip in a sum.

Being late once can be excused遲到一次是可以被原諒的；lying to cover it, or hurting someone on purpose, can be inexcusable但說謊掩飾、或故意傷害別人，就可能是inexcusable（不可原諒）的。It is a strong, judging word這是一個很強烈、帶批判意味的詞，used by adults, news writers, and anyone who wants to say "this is not all right, and please do not try to explain it away."大人、新聞寫作者、以及任何想表達「這樣不行，請不要想辦法解釋過去」的人都會用。It is about what someone did它針對的是某人做了什麼事，not about a small slip in a sum而不是算式裡的一個小失誤。

Though actually, people stretch it when they are angry — a missed message can be called inexcusable in a fight even when, in a calmer hour, it would only be rude or careless. The word is formal, but the feeling behind it is plain: the line has been crossed.

Though actually不過事實上，people stretch it when they are angry人們生氣時會把這個詞用得更廣——a missed message can be called inexcusable in a fight在吵架時，一則沒回的訊息可能被說成inexcusable，even when, in a calmer hour, it would only be rude or careless即使冷靜下來想想，那其實只是沒禮貌或粗心而已。The word is formal這個詞很正式，but the feeling behind it is plain但背後的感覺很單純：the line has been crossed就是底線被踩過了。