groundless

[ground-lis]

adjective

1. without rational basis.

   groundless fears.

   Synonyms: idle, unjustified, unfounded, baseless

groundless

/ ˈɡraʊndlɪs /

adjective

1. without reason or justification

   his suspicions were groundless

Other Word Forms

• groundlessly adverb
• groundlessness noun

Word History and Origins

Origin of groundless¹

before 900; Middle English: bottomless, unfathomable; Old English grundlēas. See ground ¹, -less

Example Sentences

Beijing at the time called the accusations "groundless".

Read more on Barron's

"But all these claims are groundless and without proof."

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The corporation, incidentally, said "these continuing attacks on BBC journalism are completely groundless – it is simply false to say that we give any political party any less scrutiny than any other".

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

Read more on Salon

The Chinese embassy in London called the report "groundless and absurd", adding that China respects freedom of speech in the UK and elsewhere.

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Related Words

• baseless 
• false 
• flimsy 
• gratuitous 
• illogical 
• illusory 
• unfounded 
• unjustified 
• unsupported 
• unwarranted