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Synonyms
baseless, foundationless, invalid, nonvalid, unfounded, unreasonable, unsubstantiated, unsupported, unwarranted
Antonyms
good, hard, just, justified, reasonable, reasoned, substantiated, valid, well-founded, well-grounded
Recent Examples on the Web
These example sentences are selected automatically from various online news sources to reflect current usage of the word 'groundless.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.
1602, in the meaning defined above
More Definitions for groundless
groundless
See the full definition for groundless in the English Language Learners Dictionary
More from Merriam-Webster on groundless
Rhyming Dictionary: Words that rhyme with groundless
Thesaurus: All synonyms and antonyms for groundless
Spanish Central: Translation of groundless
Nglish: Translation of groundless for Spanish Speakers
Britannica English: Translation of groundless for Arabic Speakers
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