Where does “вентил” come from?
вентил (Serbo-Croatian) comes from German Ventil, from Latin ventilō, from Latin ventus, from Proto-Italic wentos, from Proto-Indo-European h₂wéh₁n̥ts, from Proto-Indo-European h₂wḗh₁ti, from Proto-Indo-European h₂weh₁- — to blow.
вентил (Serbo-Croatian): valve
Ancestry of “вентил”, step by step