ق ھ رq-h-r
(ف) قَهَرَ يَقْهَرُ قَهْرًاqahara yaqharu qahran: to overpower someone and subdue him; to humiliate, to oppress. ﴿فَاَمَّا الْيَتِيْمَ فَلَا تَقْهَرْ﴾ (Aḍ-Ḍuḥā 93:9)
قَاهِرٌqāhir pl. قٰهِرُوْنَqāhirūna (adjective on the pattern of فَاعِلٌfāʿil): dominant, prevailing. ﴿وَهُوَ الْقَاهِرُ فَوْقَ عِبَادِهِۦ﴾ (Al-Anʿām 6:18)
قَهَّارٌqahhār (intensive form on the pattern of فَعَّالٌfaʿʿāl): the One who prevails irresistibly over all; an attributive name of Allah. ﴿وَهُوَ الْوَاحِدُ الْقَهَّارُ﴾ (Ar-Raʿd 13:16)