In (iii) there will be a combination of two vowels before the accent, and one of two vowels with the second accented. In rehuí, for example, the e and u might be in the same syllable by a (1), or in separate syllables by dieresis by a (1) (a), and the u and í might be in separate syllables or not by b (3) (b). Therefore, rehuí might be a monosyllable, a dissyllable, or a trisyllable.
Other combinations of three vowels may be analyzed in a similar way, as may also combinations of more than three vowels, e.g. creíais, etc.
B. SYNALEPHA
Between the contiguous vowels of separate words there may occur synalepha (which corresponds to diphthongization within a word), or hiatus (which is similar to diaeresis within a word).
Ex. Abre^una^eternidad, p. 178, XXXVI I, l. 22. ¿Á qué me lo decís? lo sé^:^es mudable, p. 179, XXXIX, l. 1. [Synalepha.]
Ex. Como la onda^azul, en cuya cresta, p. 173, XXVII, l. 16. [Hiatus.]
The vowels contracted by synalepha are each pronounced, except when the same vowel is repeated, when only a prolonged sound is heard, as in onda^azul or sé^es above.
Synalepha may join into a single syllable two, three, four, and even five vowels. The union of two vowels (diphthongal synalepha) and the union of three vowels (triphthongal synalepha) are the most common.
A pause due to a break in sense does not prevent synalepha. Mute h is disregarded in the verse and does not prevent synalepha.
Ex. Capaz de encerrarlo, y apénas ¡oh^hermosa! p. 164, I, l. 10.