So, apparently this an extremely important debate according to the Wario community so the best way to get a scientifically proven answer is to ask the less than a dozen people active on this site who's heartrate is slowly approaching 0 bpm.
I don't know, I kinda pronounce it between the A and the O because saying Ah in English feels odd to me. I kinda feel like I'm yawning when I talk English. (Though, I pronounce Mah-rio in every other language).I will give anyone who votes Wor-rio the WARIO STEAM, you don't pronounce Mario's name is Mor-rio, do you?!
If it helps, the word "warui" is pronounced war-oo-ee. Not very good at describing phonetics, but etymology momentI don't know, I kinda pronounce it between the A and the O because saying Ah in English feels odd to me. I kinda feel like I'm yawning when I talk English. (Though, I pronounce Mah-rio in every other language).