ک ھ فk-h-f
— No bare triliteral verb is in use.
كَهْفٌkahf pl. كُهُوْفٌkuhūf (noun, ism dhāt): a spacious cave in a mountain; the surah of the Cave takes its name from it. ﴿اَمْ حَسِبْتَ اَنَّ اَصْحٰبَ الْكَهْفِ وَالرَّقِيْمِ﴾ (Al-Kahf 18:9); ﴿اِذْ اَوَي الْفِتْيَةُ اِلَي الْكَهْفِ﴾ (Al-Kahf 18:10)