خ ل لkh-l-l
(ن) خَلَّ يَخُلُّ خَلًّاkhalla yakhullu khallan: to make a hole in something.
خَلٌّkhall pl. خِلَالٌkhilāl (noun, ism dhāt): hole; the gap between the two edges of a thing, crack. ﴿فَجَاسُوْا خِلٰلَ الدِّيَارِ﴾ (Al-Isrāʾ 17:5)
خُلَّةٌkhullah pl. خِلَالٌkhilāl (noun, ism dhāt): a kind of sweet grass (i.e. the sweetness pierces its way into the grass); then metaphorically it is used for friendship. ﴿لَا بَيْعٌ فِيْهِ وَلَا خُلَّةٌ﴾ (Al-Baqarah 2:254)
خَلِيْلٌkhalīl pl. اَخِلَّاءُakhillāʾu (adjective on the pattern faʿīl): close friend, intimate friend. ﴿وَاتَّخَذَ اللّٰهُ اِبْرٰهِيْمَ خَلِيْلًا﴾ (An-Nisāʾ 4:125); ﴿اَلْاَخِلَّآءُ يَوْمَئِذٍۢ بَعْضُهُمْ لِبَعْضٍ عَدُوٌّ﴾ (Az-Zukhruf 43:67)