ac - cen - tu - al
There are many reasons to learn how to divide accentual into syllables. Separating a word like accentual into syllables is mainly to make it easier to read and pronounce. The syllable is the smallest sound unit in a word, and the separation of the accentual into syllables allows speakers to better segment and emphasize each sound unit.
Knowing how to separate accentual into syllables can be especially useful for those learning to read and write, because it helps them understand and pronounce accentual more accurately. Furthermore, separating accentual into syllables can also be useful in teaching grammar and spelling, as it allows students to more easily understand and apply the rules of accentuation and syllable division.
In the case of the word accentual, we find that when separating into syllables the resulting number of syllables is 4. With this in mind, it's much easier to learn how to pronounce accentual, as we can focus on perfecting the syllabic pronunciation before trying to pronounce accentual in full or within a sentence. Likewise, this breakdown of accentual into syllables makes it easier for us to remember how to write it.