reasoned
推論した
解説 Definition
reasoned は reason（推論する、筋道立てて考える）の過去形・過去分詞です。根拠に基づいて結論を出したことや、筋道立てて考えられた内容を表します。
Reasoned is the past-tense and past-participle form of reason. It indicates that someone used facts, evidence, or logical steps to reach a conclusion rather than relying only on an unsupported guess.
覚え方のコツ Memory Tip
原形 reason に -ed を付けた過去形・過去分詞で、語尾は /d/ と発音します。reason from the facts「事実から推論する」や reason that ...「…だと筋道立てて判断する」の型で覚えます。単に guessed「推測した」のではなく、根拠を検討して結論へ進んだことを表し、形容詞では a reasoned argument のように「論理的に考え抜かれた」となります。
Connect reasoned with the base verb reason and the noun reason. Add -ed to show completed thinking in the past; because reason ends in a voiced sound, the ending is pronounced /d/. Remember two useful patterns: reason from facts and reason that something is true. In both, the thinker moves through evidence toward a conclusion. This makes reasoned stronger and more deliberate than guessed, which may lack supporting evidence. In adjectival use, a reasoned answer or argument is one developed through careful, logical consideration, not merely an answer that happens to sound convincing.
例文
She reasoned that the train was delayed.
彼女は電車が遅れているのだと推論しました。
He reasoned from the facts and reached a careful answer.
彼は事実から推論し、慎重な答えにたどり着きました。
The team reasoned that lower costs would help the project continue.
チームは、費用を下げればプロジェクトを続けやすくなると推論しました。
reasoned の類義語・関連語
類義語
対義語
紛らわしい語
reasoned の語源・成り立ち Etymology
reasoned は reason に -ed が付いた語で、reason は古フランス語 raison、さらにラテン語 ratio「計算・判断・理由」に由来します。もとは「数えて見積もる」が核なので、筋道を立てて考えた結果として「理にかなった、熟慮した」という意味になります。関連語は rational, ratio。
Reasoned is formed from reason plus the past-tense and past-participle suffix -ed. Reason entered English through Old French raison, from Latin ratio, which referred to reckoning, calculation, judgment, or an account. Ratio itself is connected with the verb reri, “to calculate or think.” The historical association between calculation and judgment helps explain the modern verbal sense: examining information in an orderly way and drawing a logical conclusion.
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