خاطئة

Etymology 2
Kazimirski and Lane considered this word to be an alternative (irregular) verbal noun of the verb. Quoting Penrice's definition of : "خَاطِئَةٌ said to be a v.a. Habitual sinfulness; or it may be regarded as the fem. of خَاطِئٌ and agree with ٱلأَفْعَالِ understood, as at 69, v. 9. Note: the ة is not unfrequently added to nouns to give intensity; [...]."

Noun

 * 1) sin, sinfulness