Synonym: baseless, idle, unfounded, unwarranted, wild. Similar words: middle ground, endless, underground, ground, grounds, grounded, foreground, groundnut. Meaning: ['graʊndlɪs] 
adj. without a basis in reason or fact.
adj. without a basis in reason or fact. 
Random good picture Not show
(61) He then made it clear that his case was airtight, but offered to forgive the $25,000 overpayment if the employee agreed to forgo his groundless suit as well.
(62) Members of the organization activities in the Sinai Peninsula, is groundless.
(63) It's entirely groundless that you put on the sarcastic stop.
(64) I then made some groundless remarks , assessing the situation over - optimistically.
(65) A close inspection of this argument would reveal how flimsy ( groundless ) it is.
(66) Therefore the allegation that China's human rights situation deteriorating is completely groundless.
More similar words: middle ground, endless, underground, ground, grounds, grounded, foreground, groundnut, groundwork, playground, gain ground, ungrounded, background, groundswell, common ground, break ground, ground floor, groundwater, on the grounds of, groundbreaking, round and round, bundle, bundle up, a bundle of, vascular bundle, profoundly, round, heedless, around, cloudless.