Where does “सिध्यति” come from?

सिध्यति (Sanskrit) comes from Sanskrit सिद्ध, from Sanskrit -त, from Proto-Indo-Iranian -tás, from Proto-Indo-European -tós — Creates verbal adjectives from verb stems.

Ancestry of “सिध्यति”, step by step

Step	Language	Word	Meaning
1	Sanskrit	सिद्ध	proven
2	Sanskrit	-त	-ed
3	Proto-Indo-Iranian	-tás	Creates verbal adjectives from verb stems
4	Proto-Indo-European	-tós	Creates verbal adjectives from verb stems

Every word from Proto-Indo-European -tós →Every word from Sanskrit -त →Every word from Sanskrit सिद्ध →