1. the quality or state of being without foundation, basis, or justification
Usage: abstract noun; typically used in formal or academic contexts

Examples

• The groundlessness of the accusation became clear when no evidence was presented.
• She dismissed his fears as pure groundlessness.
• The report criticized the groundlessness of the company's claims about product safety.
• His argument suffered from obvious groundlessness and logical fallacies.
• The groundlessness of the rumor was eventually exposed by fact-checkers.
• Legal experts pointed out the groundlessness of the lawsuit.