Word / formMeaning / explanation
Ifʿālمُكْرِمٌ / مُكْرَمٌ.
Tafʿīlمُصَرِّفٌ / مُصَرَّفٌ.
Tafaʿʿulمُتَقَبِّلٌ / مُتَقَبَّلٌ.
Mufāʿalahمُقَاتِلٌ / مُقَاتَلٌ.
Tafāʿulمُتَقَابِلٌ / مُتَقَابَلٌ.
The first of each pair is an active participle, the second a passive participle. Kasrah versus fatḥah before the last radical is the crucial morphological contrast. Lexical use also depends on whether a verb is transitive or intransitive and on the surrounding context.