The masculine singular follows فَاعِلٌ. The corresponding feminine form usually adds ة, producing فَاعِلَةٌ.
Word / formMeaning / explanation
نَاصِرٌone male helper.
نَاصِرَةٌone female helper.
سَامِعٌone male listener.
سَامِعَةٌone female listener.
This ending marks feminine gender in a noun; it is not the past-tense verbal ending.