If a person did the mistake twice or more times then the sentence is right but if a person did it once then the sentence should be like, 'Don' t repeat the mistake '. Here we shouldn't use the word ' again ' in the sentence.

Identifying the mistake in the sentence:

The mistake in the sentence "Don't repeat the mistake again" lies in the word "again."

Explanation:

The word "again" is redundant in this context because the sentence already contains the word "repeat," which implies the action of doing something again. Therefore, using "again" in this sentence is unnecessary and creates redundancy.

When we say "Don't repeat," it means to avoid doing something again or to refrain from performing a particular action. Adding "again" at the end of the sentence is redundant because it essentially means "Don't repeat again," which is repeating the word "repeat."

Corrected sentence:

To convey the intended meaning without redundancy, we can simply say, "Don't repeat the mistake."

Visually appealing breakdown:

Mistake in the sentence:
- The word "again" is redundant in the sentence.

Explanation:
- The word "again" is unnecessary because "repeat" already implies doing something again.
- Using "again" in this sentence creates redundancy.

Corrected sentence:
- The mistake can be fixed by saying, "Don't repeat the mistake."