plain as day

火を見るより明らか、火を見るよりも明らか、灼然

plain as day の類語

obvious, visible, evident, open-and-shut, apparent, self-evident, tangible, crystal clear, unmistakable, self-explanatory, seeable, palpable, observable, discernible, distinct, patent, manifest, axiomatic, explicit, noticeable, clear, perceivable, express, plain, indisputable, perceptible, indubitable, perspicuous

plain as day の反意語

invisible, intangible, impalpable

plain as day の言い換えを探すには

plain as day（火を見るより明らか）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。