Where does “odkaszleć” come from?

odkaszleć (Polish) comes from Polish kaszleć, from Proto-Slavic kašьľati, from Proto-Slavic kaš(ь)ľь, from Proto-Balto-Slavic kāˀsulia, from Proto-Balto-Slavic kāˀs-, from Proto-Indo-European kʷeh₂s- — to cough.

Ancestry of “odkaszleć”, step by step

StepLanguageWordMeaning
1Polishkaszlećto cough
2Proto-Slavickašьľatito cough
3Proto-Slavickaš(ь)ľьcough
4Proto-Balto-Slavickāˀsulia—
5Proto-Balto-Slavickāˀs-—
6Proto-Indo-Europeankʷeh₂s-to cough
Every word from Proto-Indo-European kʷeh₂s- →Every word from Proto-Balto-Slavic kāˀs- →Every word from Proto-Balto-Slavic kāˀsulia →