Where does “прощенье” come from?

прощенье (Russian) comes from Russian прости́ть, from Old East Slavic простити, from Proto-Slavic prostiti — to forgive.

Ancestry of “прощенье”, step by step

StepLanguageWordMeaning
1Russianпрости́тьto excuse, to forgive, to pardon
2Old East Slavicпростити—
3Proto-Slavicprostitito forgive
Every word from Proto-Slavic prostiti →Every word from Old East Slavic простити →Every word from Russian прости́ть →