unscrupulous
Americanadjective
adjective
Synonym Usage
Unscrupulous, unprincipled refer to lack of moral standards or conscience to guide one's conduct. An unscrupulous person is without scruples of conscience, and disregards, or has contempt for, laws of right or justice with which they are perfectly well acquainted, and which should restrain their actions: Methods of making money that are unscrupulous often involve taking advantage of the unfortunate. An unprincipled person is without moral principles or ethical standards in their conduct or actions: He's an unprincipled rogue; Her unprincipled conduct got her dismissed from the job.
Other Word Forms
Derived Forms
Etymology
Origin of unscrupulous
First recorded in 1795–1805; un- 1 + scrupulous
Explanation
Use the adjective unscrupulous to describe someone who behaves in a dishonest or unethical way. Unscrupulous behavior is the unfortunate resort of many ambitious people — it’s the immoral stuff they do to make success more attainable. When you sell someone bad loans, when you hack into your competition's accounts, when you read your roommate's mail for signs of an opportunity with his girlfriend, you're being unscrupulous.
Vocabulary lists containing unscrupulous
The Catcher in the Rye
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Power Prefix: un-
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Grade 10, List 6
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Example Sentences
Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.
As all those options cost money, what unscrupulous traders actually do is either illegally burn the clothes, or illegally dump them out in the surrounding Atacama Desert.
From BBC • Apr. 19, 2026
Dentists’ reputations for being maverick investors have made them targets for unscrupulous actors.
From The Wall Street Journal • Mar. 26, 2026
He said he had become concerned about the potential for a dying person to be coerced by "unscrupulous relatives, or 'trusted' medical or legal professionals" into ending their life prematurely.
From BBC • Mar. 16, 2026
When the Justice Department and the IRS go after unscrupulous preparers, they often obtain plea deals in exchange for the preparer’s cooperation.
From MarketWatch • Feb. 27, 2026
He was an energetic but unscrupulous reporter, willing to take bribes to slant stories.
From Nazi Saboteurs by Samantha Seiple
Definitions and idiom definitions from Dictionary.com Unabridged, based on the Random House Unabridged Dictionary, © Random House, Inc. 2023
Idioms from The American Heritage® Idioms Dictionary copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.
