ا س رʾ-s-r
(ض) اَسَرَ يَأْسِرُ اَسْرًاasara yaʾsiru asran: to bind to something, to take captive. ﴿وَتَاْسِرُوْنَ فَرِيْقًا﴾ (Al-Aḥzāb 33:26)
اَسِيْرٌasīr pl. اُسٰرٰىusārā and اَسْرٰىasrā (adjective on the pattern of faʿīl): bound, captive. ﴿مِسْكِيْنًا وَّيَتِيْمًا وَّاَسِيْرًا﴾ (Al-Insān 76:8); ﴿وَاِنْ يَّاْتُوْكُمْ اُسٰرٰى تُفٰدُوْهُمْ﴾ (Al-Baqarah 2:85)