groundless
1 ENTRIES FOUND:
Britannica Dictionary definition of GROUNDLESS
[more groundless; most groundless]
:
not based on facts
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The charges against him were (completely) groundless.
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Doubts about how the new system would work proved (to be) groundless.
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groundless fears
— groundlessly
adverb— groundlessness
noun [noncount]-
the groundlessness of their fears
