So bad, so cruel, or so wrong that you cannot forgive the person who did it. It is a strong word — you are not saying something was annoying or rude, you are saying it crossed a line and the relationship may not recover. People use it for real betrayals: lying to someone who trusted you, hurting a child, leaving a friend in danger.

So bad, so cruel, or so wrong壞到、殘忍到，或錯到 that you cannot forgive the person who did it讓你無法原諒做這件事的人。 It is a strong word這是個很重的字 — you are not saying something was annoying or rude你不是在說某件事只是煩人或沒禮貌， you are saying it crossed a line而是在說它越了線， and the relationship may not recover而且關係可能回不去了。 People use it for real betrayals大家會用它來形容真正的背叛： lying to someone who trusted you對信任你的人說謊、 hurting a child傷害小孩、 leaving a friend in danger把朋友丟在危險中不管。

Note that 'cannot forgive' here is really about feeling, not ability. The speaker is saying 'I refuse to forgive this' or 'nobody should be expected to forgive this'.

Note that要注意， 'cannot forgive'「cannot forgive」 here is really about feeling, not ability在這裡講的其實是感受，不是能力。 The speaker is saying說話的人的意思是 'I refuse to forgive this'「I refuse to forgive this」（我拒絕原諒這件事） or 'nobody should be expected to forgive this'或是「nobody should be expected to forgive this」（不該有人被要求原諒這件事）。

Because it is so strong, it also gets used lightly and jokingly, and this is very common — 'putting pineapple on pizza is unforgivable', 'he was ten minutes late, unforgivable'. Tone and situation tell you which one is meant; among friends it is usually the joking one.

Because it is so strong正因為語氣這麼重， it also gets used lightly and jokingly它也常被輕鬆、開玩笑地拿來用， and this is very common而且這種用法很常見 — 'putting pineapple on pizza is unforgivable'「putting pineapple on pizza is unforgivable」（披薩加鳳梨真是不可原諒）， 'he was ten minutes late, unforgivable'「he was ten minutes late, unforgivable」（他遲到十分鐘，不可原諒）。 Tone and situation tell you which one is meant語氣和情境會告訴你是哪一種意思； among friends it is usually the joking one朋友之間通常是開玩笑的那種。

There is also a softer middle use in reviews and complaints: an unforgivable mistake in a company or a piece of work means a mistake that a professional simply should never make.

There is also a softer middle use in reviews and complaints評論和抱怨裡還有一種比較溫和的中間用法： an unforgivable mistake in a company or a piece of work公司或作品裡的 unforgivable mistake（不可原諒的錯誤） means a mistake that a professional simply should never make指的是專業人士絕對不該犯的錯誤。

Compare it with 'inexcusable', which is very close in meaning but sounds a little more formal and more about not having a good reason, while 'unforgivable' is about the feeling of the person who was hurt.

Compare it with可以拿它跟 'inexcusable'「inexcusable」 which is very close in meaning來比較，意思很接近， but sounds a little more formal and more about not having a good reason但語氣比較正式，比較強調找不到好理由， while 'unforgivable' is about the feeling of the person who was hurt而「unforgivable」講的是受傷的人的感受。