Apologies if this annoys proponents of “toposes “.
It appears to me that there are three main candidates for pronunciation, all focusing on the last syllable:
- Top-oy (rhyming with “toy” in British English)
- Top-oh-ee (less likely, I feel)
So which, if any, is most commonly used? I do see this as an objective question, in the same way that there is a correct answer to “what is the commonly accepted pronunciation of ‘Lie’?”.