مَفْعُولٌ is the regular sound-triliteral pattern. Augmented verbs retain the structural features of their own forms.
Word / formMeaning / explanation
نَصَرَ ← مَنْصُورٌForm I, mafʿūl.
أَكْرَمَ ← مُكْرَمٌForm IV, mufʿal.
اِجْتَنَبَ ← مُجْتَنَبٌForm VIII, muftaʿal.
تَقَبَّلَ ← مُتَقَبَّلٌForm V, mutafaʿʿal.
Forcing every passive participle onto the simple mafʿūl pattern loses the augmented form's characteristic consonants.