Where does “धन्यवाद” come from?

धन्यवाद (Sanskrit) comes from Sanskrit धन्य, from Sanskrit धन, from Sanskrit धन्, from Proto-Indo-European dʰenh₂- — to set in motion; to flow.

Ancestry of “धन्यवाद”, step by step

Step	Language	Word	Meaning
1	Sanskrit	धन्य	bringing or bestowing wealth, opulent, rich;...
2	Sanskrit	धन	the prize of a contest; booty; contest, strife;...
3	Sanskrit	धन्	cl.1 P. धनति, to sound L; cl.3 P. दधन्ति. to...
4	Proto-Indo-European	dʰenh₂-	to set in motion; to flow

धन्यवाद — Etymology, Origin & Word History | Etymology Explorer