wind - chill
There are many reasons to learn how to divide windchill into syllables. Separating a word like windchill 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 windchill into syllables allows speakers to better segment and emphasize each sound unit.
Knowing how to separate windchill into syllables can be especially useful for those learning to read and write, because it helps them understand and pronounce windchill more accurately. Furthermore, separating windchill 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 windchill, we find that when separating into syllables the resulting number of syllables is 2. With this in mind, it's much easier to learn how to pronounce windchill, as we can focus on perfecting the syllabic pronunciation before trying to pronounce windchill in full or within a sentence. Likewise, this breakdown of windchill into syllables makes it easier for us to remember how to write it.