As for why the word pronounce has an O between the two N’s and pronunciation does not, it is unclear, but both words derive from French, pronunciation from pronunciation and pronounce from pronuncier. There is probably some variation in the way the different word stress affected how the words were spelled after being borrowed into English.
It would be great if this answer were correct, because it at least presents some consistent rules. It also explains why a cutting router is pronounced router instead of rooter. But this answer doesn't give a hint as to why a road would be pronounced root, and unfortunately the electronic device is, in American English, always pronounced router, so the middle part is just wrong.
Æ is pronounced very close to e in echo, and when I read the English word encyclopædia I naturally pronounce it as described, confusing an American listener. ø or oe is pronounced as the German ö, also as a single sound.
pronunciation - How is "æ" supposed to be pronounced? - English ...
How should the "^" symbol be pronounced? I searched on the internet but couldn't find an answer.
pronunciation - How to pronounce the ^ symbol? - English Language ...
How are i.e. and e.g. pronounced? When I was in college, one of my philosophy professors instructed us to use translated English for abbreviated or initialized latinisms when reading a text aloud. I would agree that in most cases you should speak the translated English rather than speaking the letters of the initialization. i.e. is used for clarification and should be spoken "that is". While ...