without grounds

without grounds の類語

unsubstantiated, untested, unconfirmed, unverified, uncorroborated, uncertified, unauthenticated, groundless, unsupported, unestablished, inconclusive, untried, unfounded, unproved, undetermined, unfixed, indecisive, unsettled

without grounds の反意語

confirmed, supported, established, certified

without grounds の言い換えを探すには

without grounds（）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。