scruple

A scruple is mainly a feeling that something may be wrong, and that feeling makes you hesitate. Imagine someone being asked to lie for money but refusing because they have scruples about it. In everyday English, this moral sense is the one most people mean. The word can also refer to a very small amount, though that use is much less common today.

The word comes from an old unit of weight, very small, about one twenty-fourth of an ounce. Over time, the idea of something tiny also came to suggest a small but serious doubt in the mind. A person with scruples cares about doing what feels right, even when that makes life harder. In stories, this kind of inner struggle often appears in characters who pause because their conscience will not let them act easily.

The word scruple carries a fascinating duality. It can refer to either a tiny amount of something or a feeling of moral hesitation that prevents you from acting.

Historically, a scruple was an ancient unit of weight, so small that it was used for measuring ingredients in medicine and alchemy. That literal sense is now rare, but the idea of something very small still survives in older or more literary uses.

More commonly today, scruple describes a feeling of moral unease or a principle that prevents you from doing something considered wrong. A person with scruples has strong ethical beliefs and won't compromise them easily. For example: "She had no scruples about lying to protect her friend," means she didn't feel any guilt or hesitation about the deception. Conversely, "He voiced his scruples regarding the company's environmental practices" indicates he felt morally opposed to their actions.

The word suggests a delicate balance between right and wrong, and often implies a personal struggle with difficult choices. It's not simply a matter of disagreement; it's a deep-seated moral objection that makes an action feel impossible to perform without guilt.

So whether you're talking about an insignificant amount or a powerful ethical concern, scruple speaks to the small details—both in measurement and in morality—that shape our decisions and define our character.