ع ر رʿ-r-r
(ن، ض) عَرَّ يَعُرُّ وَيَعِرُّ عَرًّاʿarra yaʿurru wa-yaʿirru ʿarran: (1) to be afflicted with mange (2) to come as a petitioner (this verb is not used in the Quran).
مَعَرَّةٌmaʿarrah (noun, ism dhāt): distress, evil, harm. ﴿فَتُصِيْبَكُمْ مِّنْهُمْ مَّعَرَّةٌۢ بِغَيْرِ عِلْمٍ﴾ (Al-Fatḥ 48:25)
Form VIII (iftiʿāl) اِعْتَرَّ يَعْتَرُّ اِعْتِرَارًاiʿtarra yaʿtarru iʿtirāran: to come for a gift without asking (al-Munjid); to present oneself in order to beg but say nothing with the tongue, to become a petition in form (Ḥāfiẓ Aḥmad Yār).
مُعْتَرٌّmuʿtarr (active participle, ism fāʿil): one who becomes a petition in form. ﴿وَاَطْعِمُوا الْقَانِعَ وَالْمُعْتَرَّ﴾ (Al-Ḥajj 22:36)