synalepha may join into a single syllable two, three, four, and even five vowels.
synalepha occurs when the final vowel of the first word is accented.
synalepha takes place between two contiguous unaccented vowels belonging to separate words.
In the above-mentioned case, the phrase de^oro is usually joined by synalepha.
But synalepha may occur in combinations of vowels in which syneresis would be impossible.