Where does “आद्य” come from?

आद्य (Sanskrit) comes from Sanskrit आदि, from Hindi आदा, from Prakrit *𑀆𑀤𑁆𑀤𑀅, from Sanskrit आर्द्रक, from Sanskrit आर्द्र — wet, moist, damp.

आद्य (Sanskrit): being at the beginning, first, primitive;...