groundlessly

From groundless +‎ -ly.

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groundlessly (comparative more groundlessly, superlative most groundlessly)

1. In a groundless manner; without justification.
   • 1846 October 1 – 1848 April 1, Charles Dickens, Dombey and Son, London: Bradbury and Evans, […], published 1848, →OCLC:

     Shame, disappointment, and discomfiture gnawed at his heart; a constant apprehension of being overtaken, or met—for he was groundlessly afraid even of travellers, who came towards him by the way he was going—oppressed him heavily.

   • 2024 February 16, Mike Howell, “Partnership With ADL Compromises FBI’s Integrity and Fairness”, in The Daily Signal‎^[1]:

     For example, the organization has groundlessly denounced Elon Musk, a powerful libertarian voice, as an antisemite in a baldfaced effort to drain his social network, X, of advertising revenue. Yet, when now-Minority Leader Hakeem Jeffries (D-N.Y.) came to the defense of his uncle for antisemitic remarks he made in the ’90s, the organization refused to condemn him.