After looking up the pronunciation on various online resources such as How to Pronounce Megalomaniacal by Emma Saying on Youtube. I came to the conclusion that this pronunciation is mega-luh-may-knee-ak-al.
However, I then watched Head to Head — Dawkins on religion: Is Religion Good or Evil? Both people in the video make a point about an alternative pronunciation to that which one would generally expect and that which I have determined. Mega-luh-man-eye-acal.
Does anybody have any further insights?
While we are here, what about 'controversy'? It is also used in Head to Head here. Is that correct I always thought it was "contra-versy" rather than "con-trov-ersy".