If you mean the Spanish ''por'' as in the English ''for'', its για (gia).
The question "Por que la pregunta mean in English" translates to "Why does the question mean in English?" in English.
por auto = by car
es por ti = is for you
For your
if
por kay (spelt 'por que') is simply "why"; e.g. 'por que no?', "why not?"
"Por su puesto" translates to "of course" in English.
por la vida= for life
If you please
why not
of course