mistake is an error or fault in defective judgement - the Greek word which means this is λάθος (lAthos - the emphasis in pronounciation goes on the vowel in the first syllable). Contrast this with the word ήμαρτον (EEmartOHn - the accent goes on the first vowel in the first syllable - loosely translated: I have witnessed wrongly) which is an admission that one is taking responsibility for one's sin.
Error,Mishap
Here: You made a mistake spelling the word "sentence."
The word mistake is an abstract noun, a word for an error in action or judgement.
The Latin word for mistake is error
mistake=err
I guess it can be error? An error is the mistake, to make a mistake is to err.
The spelling mistake in that sentence is in the word "mistake".
It was a mistake to ask your grandmother her age.
The word his can only be maid a grammar mistake if spelled wrong or capitalized
The word for revealing one's innermost intentions by mistake is "inadvertently."
no mistake
You've made a big mistake, mister.