(_esdrújulas_). Therefore, _pórtico_ and _olmos_ assonate in ó-o.

For purposes of assonance little use is made of words accented on a
syllable preceding the antepenult.

In a final accented or unaccented syllable u and i are absorbed, for
purposes of assonance, by a preceding or following a, o, or e.
Therefore, _sabia_ and _gratia_ assonate in á-a; _igual_ and _mar_
assonate in a, _pleita_ and _pliega_ assonate in é-a.

If in assonance a weak vowel is united in a diphthong with a strong
vowel, the assonance is called _compound assonance_, e.g.
_guarda--fatua_.

Assonance between two single vowels is called _simple assonance_, e.g.
_sangre--trae_.

This distinction is of little value, however, for verses in simple and
compound assonance alternate constantly.

In the case of two strong vowels forming a diphthong after an accented
syllable, the following rules apply.

a in a final unaccented syllable predominates over a preceding or
succeeding o in the same syllable. Therefore, _Astárloa_ and _Dánao_
assonate in á-a.

a in a final unaccented syllable predominates over a preceding or
following e in the same syllable. Therefore, _corpórea_ and _rósea_
assonate in ó-a.