Where does “acetylobenzen” come from?

acetylobenzen (Polish) comes from Polish -o-, from Old Polish -o-, from Proto-Slavic -o-.

Ancestry of “acetylobenzen”, step by step

StepLanguageWordMeaning
1Polish-o-—
2Old Polish-o-—
3Proto-Slavic-o-—
Every word from Proto-Slavic -o- →Every word from Polish -o- →Every word from Old Polish -o- →