(+) Show or Hide the "Key"
There is another mark in the Greek grammar that you need to know about. It's called "Διαλυτικά". This is related to the accent (τόνος).
As we know there are seven double vowels. The second letter of these doubles is either "ι" or "υ". What if a double vowel needs to be read separately. Let's see an example:
The word "γαιδούρι" means donkey and is pronounced "gai-THOU-ri".
But according to what we've learned we should pronounce it "ge-THOU-ri.
That's where Dialytika comes to play. By putting the ¨ on top of the "ι", we show that we need to read the double vowels not as one sound, but as two separate sounds.
So the correct writing is "γαϊδούρι", and the correct pronunciation is "gai-THOU-ri". From now on when you see this mark in books you know that you should separate the double vowel to the sounds of each letter.