undoubtedly
undoubtedly はTOEIC 860・TOEFL 80・IELTS 6.5レベルの英単語で、「間違いなく、疑いなく」という意味があります。発音記号は /ʌnˈdaʊtɪdli/ です。
意味一覧 (2件)
間違いなく
解説 Definition
疑いの余地がなく、絶対的に確実であることを意味する言葉です。非常に強い確信を表現します。
Undoubtedly means certainly or without any doubt. It is used to strongly show that something is true or will happen. The word is more formal than simple words like definitely.
覚え方のコツ Memory Tip
このエントリでは undoubtedly を「間違いなく」と覚える。答えや判断に誤りがない、と強く断定する響きに注目するとよい。基本義の「疑いなく」と近いが、ここでは「誤りではない」「正しい選択だ」と確認する感覚に寄せて捉える。doubt「疑う」に un- が付き、疑問を取り除いて結論を押し出す副詞だと考えると、This is undoubtedly correct のような文で残りやすい。
Build it step by step: doubt, then un- for "not," then -ly for an adverb. So undoubtedly means "without doubt" in one word. You can connect it to the phrase "without a doubt" and remember that it sounds stronger than probably.
例文
He is undoubtedly the best player.
彼は疑いなく最高の選手だ。
This is undoubtedly the right choice.
これは疑いなく正しい選択だ。
She is undoubtedly talented.
彼女は疑いなく才能がある。
疑いなく
(意味 2)解説 Definition
undoubtedly は、事実・評価・結論について、話し手が疑問の余地がないと強く判断する時に使う副詞です。日常会話にも使えますが、やや書き言葉寄りで、根拠のある確信を落ち着いて示す場面によく合います。
Undoubtedly is an adverb used when the speaker feels there is no real reason to doubt something. It shows strong confidence about a fact, judgment, or conclusion, often based on some clear reason or evidence. It is common in both speech and writing, but it can sound a little more formal than words like definitely.
覚え方のコツ Memory Tip
中心にあるのは doubt「疑う」。un- は「〜でない」、-ly は副詞を作る形なので、undoubtedly は「疑いがない状態で」と組み立てられる。probably「おそらく」よりずっと強く、certainly や definitely に近いが、少し改まった響きがある。undoubtedly true、undoubtedly one of the best、will undoubtedly affect のように、事実・評価・予測に強い確信を添える形で覚えるとよい。
Focus on the center word doubt. Add un-, meaning "not," and -ly, which makes an adverb, and you get the idea of "in a way that has no doubt." It is much stronger than probably and close to certainly or definitely, but it often sounds a little more formal. Remember common patterns like undoubtedly true, undoubtedly one of the best, and will undoubtedly affect.
例文
She is undoubtedly the best person for the job.
彼女は疑いなくその仕事に最もふさわしい人だ。
This decision will undoubtedly affect the whole team.
この決定は疑いなくチーム全体に影響するだろう。
He was undoubtedly tired, but he still finished the report.
彼は疑いなく疲れていたが、それでも報告書を仕上げた。
undoubtedly の語源・成り立ち Etymology
undoubtedlyはun-「否定」+ doubt + -lyから成り、doubtは古フランス語経由でラテン語dubitare「二つの間で揺れる」に由来します。dubiousやdoubleと同根で、疑いとは心が二つに割れることだと分かると、undoubtedlyが「迷いなく」を表すのも自然です。
"Undoubtedly" is built from un-, doubt, and -ly. Doubt came through Old French from Latin dubitare, meaning "to hesitate" or "waver," and it is related to dubious and even double through the idea of being of two minds. So undoubtedly developed the sense of being without hesitation or uncertainty.
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