Where does “rozśmiać” come from?

rozśmiać (Polish) comes from Polish roz-, from Old Polish roz-, from Proto-Slavic orz- — dis-.

Ancestry of “rozśmiać”, step by step

StepLanguageWordMeaning
1Polishroz-Indicates movement apart, dissolution or undoing...
2Old Polishroz-indicates dissolution or undoing a process, dis
3Proto-Slavicorz-dis-
Every word from Proto-Slavic orz- →Every word from Polish roz- →Every word from Old Polish roz- →