Refers to a mistake or botched attempt, often implying a careless or clumsy error. Derived from the verb やり損なう (to fail in doing).
See also: 遣り損なう (やりそこなう)
The project was delayed because of his blunder.
A small slip-up turned into a big problem.
Kanji spelling using 損; usually written in kana.
Variant kanji spelling with 損い; also less common than kana.
Uses the less common 遣 kanji; rarely seen.
Rare variant combining 遣 and 損い.
Noun form of the verb やり損なう (to fail in doing), from やり (stem of やる 'to do') + 損なう (to fail, to miss).