groundless

adjective

ground·​less ˈgrau̇n(d)-ləs 

: having no ground or foundation

groundless fears

groundlessly adverb

groundlessness noun

Synonyms

• baseless
• foundationless
• invalid
• nonvalid
• unfounded
• unreasonable
• unsubstantiated
• unsupported
• unwarranted

Examples of groundless in a Sentence

please stop making groundless accusations against innocent people

fears of a strike proved groundless

Recent Examples on the Web

While the other governors’ concern is probably groundless, the new reserves are proving politically useful for some in this era of fearmongering politicos. —Thomas Elias, The Mercury News, 1 Nov. 2024

The upshot is that the AI can computationally generate a response that appears to be accurate but is groundless and not based on facts. —Lance Eliot, Forbes, 1 Nov. 2024

Trump has long spread groundless claims about his opponents based on their personal history, particularly women and racial minorities. —Michelle L. Price, Fortune, 20 Oct. 2024

The rider who smashed his phone insisted in an interview with Chinese state media that the complaint lodged against him was groundless. —Chris Lau, CNN, 17 Oct. 2024

Word History

First Known Use

1602, in the meaning defined above

Kids Definition

groundless

adjective

ground·​less ˈgrau̇n-(d)ləs 

: not justified : having no real basis

groundless fears

groundlessly adverb

groundlessness noun