noun
blunder; failure; mistake; error
Refers to a mistake or failure in doing something, often implying a slip or botched attempt. Commonly used in the phrase 仕損じる (to make a mistake).
計算の仕損じで、予算が合わなかった。
Due to a miscalculation, the budget didn't add up.
彼は仕事で大きな仕損じをしてしまった。
He made a big blunder at work.
失敗 is the general word for failure or mistake. 仕損じ is less common and often implies a blunder or slip in execution.
間違い is a broad term for error or mistake. 仕損じ carries a nuance of a failed attempt or botched action.
Compound of 仕 (し, continuative form of する 'to do') + 損じ (そんじ, continuative form of 損じる 'to fail, to damage'). Literally 'doing-failure'.