groundless

[ground-lis] / ˈgraʊnd lɪs /

ADJECTIVE

without reason, justification

Synonyms

STRONGEST

baseless false flimsy gratuitous illogical illusory unfounded unjustified unsupported unwarranted

WEAK

bottomless causeless chimerical empty foundationless idle imaginary unauthorized uncalled-for unprovoked

Antonyms

STRONGEST

correct genuine justified real reasonable right substantiated warranted

WEAK

called-for grounded proven

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.

China accused Britain's Keir Starmer of making "groundless accusations" on Tuesday, a day after the prime minister said he would engage with Beijing but warned China posed a national security threat.

From Barron's • Dec. 2, 2025

“The impact on the bookings has been quite hard,” said Patel, who called the lawsuit groundless.

From The Wall Street Journal • Nov. 20, 2025

Lot of reasons for that, it’s not groundless optimism.

From Salon • Aug. 5, 2025

But China's Commerce Ministry rebuffed this as "groundless with no factual basis".

From BBC • Apr. 30, 2025

As it turns out, the theory is groundless; on the next Saturday, Pete even brings me a homemade Egg McMuffin as a treat.

From "Nickel and Dimed: On (Not) Getting By in America" by Barbara Ehrenreich

Vocabulary lists containing groundless

"Oedipus the King" by Sophocles

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!

Awkward

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!

Because They Marched

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!