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A qualm is a small, feeling that maybe what you are doing is not right. You have qualms about lying, about spending too much, about walking past someone who needs help. English likes the phrase have no qualms: if you have no qualms about something, you are not bothered at all. The feeling is lighter than guilt and shorter than a crisis; it is a , then it may pass. Though actually, an older sense still lives in some writing: a qualm can also be a sudden sick feeling in the stomach. That use is less common now. The moral-doubt sense is the one you will meet in news and novels. It is slightly formal; a child would more likely say I don’t feel right about this.
良心不安；一絲愧疚或疑慮（have no qualms about ≈ 對……毫無顧忌）
組成Not certain. It may come from an old English word for death or plague, or from a Dutch or German word for thick air or smoke. Scholars do not agree, so the honest answer is that we do not know for sure.
原始詞典資料6 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
qualmnoun/kwɑːm/
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A feeling of apprehension, doubt, fear etc.
- [W]ho vvould not rather Sleep Quietly upon a Hammock, vvithout either Cares in his Head, or Crudities in his Stomach, then lye Carking upon a Bed of State, vvith the Qualms and Tvvinges that accompany Surfeits and Exceſs?
- "Do you have any particular qualms about leaving Pencey?" / "Oh, I have a few qualms, all right. Sure … but not too many. Not yet, anyway.[…]"
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A sudden sickly feeling; queasiness.
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A prick of the conscience; a moral scruple, a pang of guilt.
- This lawyer has no qualms about saving people who are on the wrong side of the law.
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archaicdialectalMortality; plague; pestilence.
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archaicdialectalA calamity or disaster.
qualmverb/kwɑːm/
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To have a sickly feeling.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。