From the root ب خ ر (b ḵ r), related to vapor. Compare with بَخَرَ (baḵara, “to boil”), تَبَخَّر (tabaḵḵar, “to evaporate, to perfume with incense”) and بُخُور (buḵūr, “incense”).
Practica parlar i memoritzar " بخار " i moltes altres paraules i frases a Arabic .