Where does “-त्या” come from?

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

Ancestry of “-त्या”, step by step

StepLanguageWordMeaning
1Sanskrit-त-ed
2Proto-Indo-Iranian-tásCreates verbal adjectives from verb stems
3Proto-Indo-European-tósCreates verbal adjectives from verb stems

Words derived from “-त्या

Every word from Proto-Indo-European -tósEvery word from Sanskrit -तEvery word from Proto-Indo-Iranian -tás