mistakes
n. countablen. actions or decisions that are not correct and lead to a result you did not want. You often learn how to do things better by making them.
n. actions, decisions, or judgements that are misguided or wrong. Often used to describe errors in calculation, speech, or conduct.
I made several mistakes on my math test today.
The manager admitted that hiring the new consultant was one of his biggest mistakes this year.
While minor spelling mistakes are easily forgiven in casual correspondence, errors in a legal contract can lead to significant financial liabilities for both parties involved.
Commonly used with the verb 'make' rather than 'do'.
I did a mistakeI made a mistakeIn English, you 'make' a mistake; 'do' is not used with this noun.