noun, noun or participle which takes 'suru', intransitive verb
General term for a mistake or misstep, often implying a lapse in judgment or execution. Used as both a noun and a suru-verb.
彼の失策でプロジェクトが遅れた。
The project was delayed due to his blunder.
大事な
I made a mistake at a crucial moment.
noun
Baseball term for a fielding error. Used as a noun.
ショートの失策で一点入った。
A run scored on the shortstop's error.