Where does “Drgas” come from?

Drgas (Polish) comes from Polish drgać, from Proto-Slavic drъgati, from Proto-Balto-Slavic drugā́ˀtei.

Ancestry of “Drgas”, step by step

StepLanguageWordMeaning
1Polishdrgaćto vibrate, to tremble, to quiver
2Proto-Slavicdrъgatito tremble, shake
3Proto-Balto-Slavicdrugā́ˀtei—
Every word from Proto-Balto-Slavic drugā́ˀtei →Every word from Proto-Slavic drъgati →Every word from Polish drgać →