ک د یk-d-y
(ض) كَدَيٰ يَكْدِيْ كَدْيًاkadā yakdī kadyan: in digging a well, to reach hard rock and find no water. (This verb is not used in the Quran.)
Form IV (ifʿāl) أَكْدَيٰ يُكْدِيْ إِكْدَاءًakdā yukdī ikdāʾan: to stop giving, to hold back one's hand — the original sense is that same rock: he gave a little at first, then stopped. Only once in the Quran: ﴿وَأَعْطٰى قَلِيْلًا وَّأَكْدٰى﴾ (An-Najm 53:34).