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необоснованный meaning in English

RussianEnglish
необоснованный adjective

gratuitous(not called for by the circumstances)
adjective
[UK: ɡrə.ˈtjuːɪ.təs] [US: ɡrə.ˈtuːə.təs]

unfounded(not based on solid reasons or facts)
adjective
[UK: ˌʌn.ˈfaʊn.dɪd] [US: ən.ˈfaʊn.dəd]