ف ک کf-k-k
(ن) فَكَّ يَفُكُّ فَكًّاfakka yafukku fakkan (original form: فَكَكَ يَفْكُكُfakaka yafkuku): to separate what is joined; to undo a knot; to free a slave or captive. (This verb is not used in the Quran.)
فَكٌّfakk (verbal noun, maṣdar): freeing, setting free. ﴿فَكُّ رَقَبَةٍ﴾ (Al-Balad 90:13)
Form VII (infiʿāl) اِنْفَكَّ يَنْفَكُّ اِنْفِكَاكًاinfakka yanfakku infikākan: to come apart, to desist; مُنْفَكٌّmunfakk pl. مُنْفَكِّيْنَmunfakkīna (active participle, ism fāʿil): one who desists. ﴿لَمْ يَكُنِ الَّذِيْنَ كَفَرُوْا مِنْ اَهْلِ الْكِتٰبِ وَالْمُشْرِكِيْنَ مُنْفَكِّيْنَ حَتّٰى تَاْتِيَهُمُ الْبَيِّنَةُ﴾ (Al-Bayyinah 98:1)