groundless

根拠のない,理由のない

groundless の類語

unfounded, unsubstantiated, unwarranted, baseless, unsupported, idle, wild, unconfirmed, ill-founded, untested, unverified, without basis, without foundation, not proved, without grounds, gratuitous, empty, unsustainable, inconclusive, unproven, not following, unsupported by evidence, untried, vain, ungrounded, uncorroborated, uncertified, unproved, unsettled, untenable, unauthenticated, unestablished, undetermined, indecisive, imaginary, unreasonable, hypothetical, not well-founded, speculative, built on sand, unfixed, unsupportable, flimsy, unjustified, tenuous, bottomless, unattested, unvalidated, uncalled-for, illusory, unsound, unjustifiable, uncalled for, chimerical, unascertained, sophistic, suppositional

groundless の反意語

supported, run, confirmed

例文

• The fact is that the rumor is groundless.
  実はそのうわさは根拠がない。
• They are always believing a groundless rumor.
  つまらないうわさを信じてばかりいるんだから。
• The rumor turned out to be groundless.
  そのうわさは根も葉もないことが分かった。

groundless の言い換えを探すには

groundless（根拠のない）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。