Where does “prōtestārī” come from?

prōtestārī (Latin) comes from Latin testor, from Latin testis, from Latin terstis, from Latin trīstis, from Proto-Indo-European tristh₂s, from Proto-Indo-European steh₂- — to stand.

Ancestry of “prōtestārī”, step by step

prōtestārī traces back through two separate lines of ancestry.

via Latin testor

StepLanguageWordMeaning
1LatintestorI am witness, testify, attest; I make a will
2Latintestiswitness; one who testifies or attests; testicle
3Latinterstis
4Latintrīstissad, unhappy, melancholy, morose
5Proto-Indo-Europeantristh₂sa third party standing, after the two parties to...
6Proto-Indo-Europeansteh₂-to stand

via Latin prō

StepLanguageWordMeaning
1Latinprōfor
2Latinratusconsidered, having been considered; established,...
3Latinrēōrto reckon, calculate
4Proto-Italicrēōrto reckon, to calculate; to think, to deem, to...
5Proto-Indo-Europeanh₂reh₁-to think, reason; to arrange
6Proto-Indo-Europeanh₂er-to fit, to fix, to put together

Words derived from “prōtestārī

Every word from Proto-Indo-European steh₂-Every word from Proto-Indo-European tristh₂sEvery word from Latin trīstis
prōtestārī — Etymology, Origin & Word History | Etymology Explorer