without basis

without basis の類語

groundless, unsubstantiated, unsupported, unconfirmed, unverified, without foundation, untested, uncorroborated, uncertified, unauthenticated, unfounded, unsustainable, ungrounded, baseless, inconclusive, unestablished, unsupportable, untried, unwarranted, unproved, untenable, undetermined, unfixed, vain, indecisive, empty, unsettled, idle

without basis の反意語

supported, confirmed, certified

without basis の言い換えを探すには

without basis（）の類語・言い換え（パラフレーズ）を、日本語訳つきで関連度順に並べています。英作文の語彙を増やしたいとき、長文読解で本文と選択肢の言い換えを見抜きたいときに使えます。