Where does “bardzok” come from?

bardzok (Polish) comes from Polish bardzo, from Old Polish barzo, from Old Polish -o, from Proto-Slavic *-ǫ.

Ancestry of “bardzok”, step by step

StepLanguageWordMeaning
1Polishbardzovery; very much
2Old Polishbarzovery
3Old Polish-oforms adverbs from adjectives
4Proto-Slavic*-ǫ—
Every word from Proto-Slavic *-ǫ →Every word from Old Polish -o →Every word from Old Polish barzo →