This is the 364th most frequent Dutch word.
fout
"Fout" means "mistake" or "error" in English.
Used as a noun to mean 'error' or 'mistake'.
De fout in de berekening moest worden gecorrigeerd.
The error in the calculation had to be corrected.
Used as an adjective to mean 'wrong' or 'incorrect'.
Het was fout van mij om dat te zeggen.
It was wrong of me to say that.
Used as part of a compound noun 'foutmelding' meaning 'error message' referring to technical context.