Where does “łatwo” come from?

łatwo (Silesian) comes from Old Polish łatwo, from Old Polish -o, from Proto-Slavic *-ǫ.

Ancestry of “łatwo”, step by step

StepLanguageWordMeaning
1Old Polishłatwoeasily
2Old Polish-oforms adverbs from adjectives
3Proto-Slavic*-ǫ—
Every word from Proto-Slavic *-ǫ →Every word from Old Polish -o →Every word from Old Polish łatwo →