Apply the same singular, dual and plural slots to n-ṣ-r:
Word / formMeaning / explanation
مَنْصَرٌsingular, mafʿal.
مَنْصَرَانِdual, mafʿalāni.
مَنَاصِرُbroken plural, mafāʿilu.
Unlike maḍrib, the singular manṣar has fatḥah on its middle radical. Both, however, can fit the broad broken-plural template mafāʿil.