unethical
Americanadjective
-
lacking moral principles; unwilling to adhere to proper rules of conduct.
-
not in accord with the standards of a profession.
She treated patients outside the area of her training, and the appropriate medical organization punished her unethical behavior.
adjective
Other Word Forms
Etymology
Origin of unethical
Compare meaning
How does unethical compare to similar and commonly confused words? Explore the most common comparisons:
Explanation
Eating the last cookie without sharing? That's just mean. But if you stole that cookie and then lied about it, that would be morally wrong, or unethical. The prefix un- means "not," so something or someone who's unethical is literally "not ethical." In other words, that someone is lacking principles or morals. Because being unethical involves going against social or professional expectations of what's right, it's a word that's often used to describe bad behavior or immoral conduct. So like the great philosophers, you can decide if Cookie Monster has an ethics problem — or just bad eating habits.
Vocabulary lists containing unethical
Even More Negative Words to Describe a Person
Looking to grow your vocabulary? Check out this interactive, curated word list from our team of English language specialists at Vocabulary.com – one of over 17,000 lists we've built to help learners worldwide!
Power Prefix: un-
Interested in learning more words like this one? Our team at Vocabulary.com has got you covered! You can review flashcards, quiz yourself, practice spelling, and more – and it's all completely free to use!
The Phantom Tollbooth
Want to remember this word for good? Start your learning journey today with our library of interactive, themed word lists built by the experts at Vocabulary.com – we'll help you make the most of your study time!
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.
The BPS and other professional bodies, including NHS England and the Royal College of Psychiatrists, said all types of conversion practices are "unethical and potentially harmful".
From BBC • Jul. 4, 2026
“It’s Florida, Man,” HBO Max “What you’re about to see may be dangerous, illegal, unethical, petty, misguided, immoral and most definitely stupid,” a prologue warns at the top of each episode.
From Salon • Jul. 1, 2026
Related: Is it unethical to use AI in my Airbnb photos to market my property to guests?
From MarketWatch • Jun. 22, 2026
Epshteyn’s lawyer told the Journal that he has never engaged in unethical conduct.
From The Wall Street Journal • Jun. 16, 2026
“Just because something is illegal or unethical, that doesn’t mean that someone hasn’t done it.”
From "Boy 2.0" by Tracey Baptiste
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.
