Where does “dziesięciobok” come from?

dziesięciobok (Polish) comes from Polish bok, from Old Polish bok, from Proto-Slavic bokъ — side.

Ancestry of “dziesięciobok”, step by step

dziesięciobok traces back through two separate lines of ancestry.

via Polish bok

StepLanguageWordMeaning
1Polishbokside
2Old Polishbokside, flank
3Proto-Slavicbokъside

via Polish dziesięć

StepLanguageWordMeaning
1Polishdziesięćten
2Proto-Slavic*dȅsętьten
Every word from Proto-Slavic bokъ →Every word from Old Polish bok →Every word from Polish bok →