unsuccessful
失敗した
解説 Definition
unsuccessful は successful（成功した）に否定の un- が付いた形で、「成功しなかった、失敗した」という意味です。試みや計画、応募などが望んだ結果に届かなかったことを表します。
Not achieving the desired result or intended purpose. It commonly describes an attempt, plan, effort, or application that fails to produce the outcome someone wanted.
覚え方のコツ Memory Tip
successful「成功した」の先頭に否定の un- を付けた語で、「成功しなかった」と捉えます。an unsuccessful attempt「失敗に終わった試み」や an unsuccessful application「通らなかった応募」のように、望んだ結果を得られなかった計画・努力・応募について使うと覚えましょう。
Connect this word directly with successful. The prefix un- reverses the meaning, so unsuccessful describes something that did not reach its intended result. Learn it through common combinations such as an unsuccessful attempt, an unsuccessful effort, and an unsuccessful application. It does not necessarily suggest that no effort was made; it focuses on the result. For example, a team may work carefully but still make an unsuccessful attempt to repair a machine.
例文
The first attempt was unsuccessful.
最初の試みは失敗しました。
His application was unsuccessful this time.
彼の応募は今回はうまくいきませんでした。
The team made an unsuccessful effort to fix the machine.
チームは機械を直そうとしましたが、成功しませんでした。
unsuccessful の類義語・関連語
unsuccessful の語源・成り立ち Etymology
un-（否定接頭辞）+ success（成功）+ -ful（形容詞化接尾辞）の構成。successはラテン語「successus（後に続くこと）」から、sub-（下に）+ cedere（進む）が語源。関連語：succeed（成功する）、succession（継承）。「後に続けなかった」が原義。
Unsuccessful is formed from the negative prefix un- and successful, which consists of success plus the adjective-forming suffix -ful. Success ultimately comes through Latin successus, from succedere, meaning “to come after” or “to turn out well.” The modern adjective therefore means that something has not resulted in the desired success.
同じレベルの英単語をもっと
外部辞書で調べる
この単語を英単語クイズで覚えよう