ieresis of two weak vowels, or of strong and weak
vowels where the strong vowel is stressed.]
page liii
But dieresis is impossible if the diphthong is _ie_ or
_ue_ from Latin _[e]_ and _[o]_ respectively, as in
_bien_, _siente_, _huevo_, _puedo_.

(3) SYNALEPHA

The final vowel or diphthong of one word and the initial
vowel or diphthong of an immediately following word in the
same line usually combine to form one syllable (this is
called "synalepha")[18] as in:

Cuan|do | re|cuer|do | la | pie|dad | sin|ce|ra
Con | qu=e e=n | m=i e=|dad | pri|me|ra
En|tra|b=a e=n | nues|tras | vie|jas | ca|te|dra|les.
(p. 137, ll. 19-21)
La | cien|c=ia au=|daz|, cuan|do | de | ti | s=e a=|le|ja.
(p. 143, l. 16)
iEs|t=a e=s | Es|pa|n=a! A=|to|ni|t=a y= | mal|tre|cha...
(p. 147, l. 3)
Que | mi | can|tar | so|no|ro
A|com|pa|n=o ha=s|t=a a=|qui|; n=o a=|pri|sio|na|do...
(p. 49, ll. 6-7)

[Footnote 18: Note that the union of vowels in separate
words is called synalepha, while the union of vowels
within a word is called syneresis. But synalepha may occur
in combinations of vowels in which syneresis would be
impossible. Compare _te|ni|a_ and _ca|no|a_ with:

A|si al | man|ce|bo in|te|rrum|pe (p. 94, l. 13).
Ni | la | mi|ra|da | que | lan|zo al | sos|la|yo (p. 219, l. 8).]

The vowels of three words may thus combine if the middle
word is _a_ (or _ha_) (see also (4), _a_):

Le | di|j=o e=s|t=e a u=|na | mu|jer.
(p. 79, l. 15)
Sal|v=a a e=s|ta | so|cie|dad | des|ven|tu|ra|da.
(p. 143, l. 12)
page liv
(4) HIATUS

(_a_) Hiatus (i.e. the final vowel of one word and the
initial vowel of the immediately following word form
separate syllables)[19] is caused by the interposition of a
weak unstressed vowel, as in:

En | sus | re|cuer|dos | de | hiel.
(p. 84, l. 3)
De | sus | a|la|mos | y | huer|tos.
(p. 91, l. 8)
Y hoy | en | sus | can|ta|res | llo|ra.
(p. 84, l. 18)

[Footnote 19: Note that hiatus between words is equivalent
to dieresis within a word.]

Note that, similarly, the vowels of three words may not
combine, if the middle word is _y, e_ (or _he_), _o_ (or
_oh_), _u_:

O|las| de | pla|ta y | a|zu