por qual motivo

for what reason

→ por

phrase Rare #41,145

for what reason Used to ask why something happened or why someone wants to do something. More formal than simply saying "por que".

PO: Por qual motivo você faltou à reunião?

EN: For what reason did you miss the meeting?

I'd like to know why you'd like to learn English?

Why?

— Arca Russa (2002)

Why are you here?

— O Lamento (2016)

Why would you like to learn English?