Where does “подтверждаться” come from?

подтверждаться (Russian) comes from Russian подтвержда́ть, from Russian подтверди́ть, from Russian твёрдый, from Old East Slavic твьрдъ, from Proto-Slavic tvьrdъ, from Proto-Balto-Slavic *twírˀtas, from Proto-Indo-European twerH- — to enclose, fence in; to grab, seize; to stir.

подтверждаться (Russian): to prove true, to be confirmed; passive of...

Definitions

  1. to prove true, to be confirmed; passive of...

Ancestry of “подтверждаться”, step by step

StepLanguageWordMeaning
1Russianподтвержда́тьto confirm, to corroborate, to bear out, to endorse, to ratify, to verify
2Russianподтверди́тьto confirm, to corroborate, to bear out, to endorse, to ratify, to verify
3Russianтвёрдыйhard, solid; firm; steadfast, steady
4Old East Slavicтвьрдъ
5Proto-Slavictvьrdъhard, firm, solid
6Proto-Balto-Slavic*twírˀtashard, firm, solid
7Proto-Indo-EuropeantwerH-to enclose, fence in; to grab, seize; to stir
Every word from Proto-Indo-European twerH-Every word from Proto-Balto-Slavic *twírˀtasEvery word from Proto-Slavic tvьrdъ