Not showing thanks for something good that someone gave you or did for you. The key word is SHOWING.

Not showing thanks for something good that someone gave you or did for you對別人給你或為你做的好事，沒有表現出感謝。The key word is SHOWING關鍵字是SHOWING（表現出來）。

"Ungrateful" is almost always a judgement made from the outside: someone helped you, and you did not say thank you, or you complained, or you acted as if it was owed to you. That last part is where the real force of the word lies — an ungrateful person treats a gift as their right.

"Ungrateful" is almost always a judgement made from the outside「ungrateful」幾乎都是從旁人角度做出的評斷: someone helped you有人幫了你, and you did not say thank you而你沒有說謝謝, or you complained或是你抱怨, or you acted as if it was owed to you或是你表現得好像這是你應得的。That last part is where the real force of the word lies最後這一點正是這個字真正力道所在 — an ungrateful person treats a gift as their right一個ungrateful的人會把別人的好意當成自己應得的權利。

Because of this, the word carries strong moral disapproval, much stronger than most un- words. Parents say it to children ("after everything we've done for you"), and it is one of the sharper things you can call someone in English.

Because of this也因為這樣, the word carries strong moral disapproval這個字帶著強烈的道德譴責, much stronger than most un- words比大部分un-開頭的字都要重得多。Parents say it to children父母會對孩子這樣說 ("after everything we've done for you")（「after everything we've done for you」）, and it is one of the sharper things you can call someone in English這也是英文裡罵人比較重的說法之一。

It is also used of behaviour rather than people: an ungrateful reply, an ungrateful silence.

It is also used of behaviour rather than people它也可以用在行為上，而不只是人: an ungrateful replyan ungrateful reply不知感恩的回應, an ungrateful silencean ungrateful silence不知感恩的沉默。

Two useful extras. English has the fixed insult "you ungrateful little…" which is genuinely angry, not playful. And the noun form is "ingratitude" — not "ungratefulness," which exists but sounds clumsy — one of those places where English switches prefix between the adjective and the noun.

Two useful extras有兩個實用的補充。English has the fixed insult "you ungrateful little…"英文有個固定的罵法「you ungrateful little…」 which is genuinely angry, not playful是真的在生氣，不是開玩笑。And the noun form is "ingratitude"名詞形式是「ingratitude」 — not "ungratefulness," which exists but sounds clumsy不是「ungratefulness」，這個字雖然存在但聽起來很笨拙 — one of those places where English switches prefix between the adjective and the noun這是英文裡形容詞和名詞會換一個字首的其中一個例子。