Where does “wyświadczyć” come from?

wyświadczyć (Silesian) comes from Silesian świadczyć, from Old Polish świadczyć, from Old Polish świadek, from Proto-Slavic *sъvědъkъ, from Proto-Slavic *sъvěděti.

wyświadczyć (Silesian): to confirm, to corroborate

Definitions

to confirm, to corroborate

Ancestry of “wyświadczyć”, step by step

Step	Language	Word	Meaning
1	Silesian	świadczyć	to witness; to be indicative, to be a sign of, to indicate, to prove, to evince, to testify, to betoken, to bear witness to, to speak to
2	Old Polish	świadczyć	to testify
3	Old Polish	świadek	witness
4	Proto-Slavic	*sъvědъkъ	witness
5	Proto-Slavic	*sъvěděti	—

Words derived from “wyświadczyć”

wyświŏdczać

Every word from Proto-Slavic *sъvěděti →Every word from Proto-Slavic *sъvědъkъ →Every word from Old Polish świadek →