pjakaŕ (Lower Sorbian) comes from Lower Sorbian pjac, from Proto-Slavic peťi, from Proto-Balto-Slavic pektei, from Proto-Indo-European pékʷeti, from Proto-Indo-European pekʷ-, from Proto-Indo-European h₃-ép-kʷ-.
pjakaŕ (Lower Sorbian): baker