The question "Why is the sky high in Hiligaynon?" is a bit tricky. It's likely asking about the reason why the sky seems so vast and expansive, a common feeling when looking up at the heavens.

There isn't a specific Hiligaynon phrase or idiom that directly translates to "the sky is high." However, the concept of the vastness of the sky is universal and can be understood in many languages.

Here are some ways to approach the question:

* Perspective: The sky appears high because of our perspective as humans standing on the ground. We see the horizon as a flat line, making the sky seem like an immense dome above us.

* Atmosphere: The atmosphere, which is the layer of gases surrounding the Earth, extends far above our heads. This creates the illusion of a vast empty space when looking up.

* Lack of reference points: Unlike the ground which has mountains, trees, and buildings, the sky has very few reference points to judge its distance. This contributes to the feeling of its immensity.

Ultimately, the reason why the sky seems high is a combination of our visual perception, the nature of the atmosphere, and the lack of readily available reference points.