The word "naïve" has a dieresis over the "i."
A mark used over a vowel to indicate that it should be pronounced separately from the preceding vowel.
The dieresis in "coöperate" shows that the vowels are pronounced separately.
A linguistic phenomenon where two adjacent vowels are pronounced in separate syllables.
مع قاموس صور قوي مجاني و بطاقات فلاش.