Word / formMeaning / explanation
مُبَعْثِرٌfrom بَعْثَرَ: one who scatters.
مُبْرَنْشِقٌfrom اِبْرَنْشَقَ: one becoming cheerful.
مُقْشَعِرٌّfrom اِقْشَعَرَّ: one whose hair stands on end.
مُتَسَرْبِلٌfrom تَسَرْبَلَ: one wearing a garment.
All four active participles begin with mīm bearing ḍammah; that alone does not identify the form. The inserted nūn, doubled final consonant and extra initial tāʾ reveal the distinct templates.