ک ن دk-n-d
(ن) كَنَدَ يَكْنُدُ كُنُوْدًاkanada yaknudu kunūdan: to be ungrateful, to deny a favour; the original sense is that of cutting (كَنَدَ الْحَبْلَkanada al-ḥabla = he cut the rope), i.e. a person who cuts the bond of gratitude.
كَنُوْدkanūd (pattern فَعُوْلfaʿūl, intensive form): utterly ungrateful. Only once in the Quran: ﴿إِنَّ الْإِنْسَانَ لِرَبِّهِۦ لَكَنُوْدٌ﴾ (Al-ʿĀdiyāt 100:6).