Los rios su curso natural reprimen (11)
In the poetry of the Middle Ages and Renaissance such pronunciations as teniá for tenía are common.
DIERESIS
Dieresis is the breaking up of vowel-combinations in such a way as to form an additional syllable in the word. It is the opposite of syneresis. Dieresis never occurs in the case of the diphthongs ie and ue derived from Latin (e), and (o), in words like tierra, bueno, etc. Uá and uó are regularly dissyllabic except after c, g, and j. Examples:
Y en su blanca luz süave (8)
En la playa un adüar (8)
En vez de desafïaros (8)
Compañero eterno su dolor crüel (12)
Grandïosa, satánica figura (11)
El carïado, lívido esqueleto (11)