low-built house
庳 centers on a low-built house, emphasizing a structure that is physically low or humble in construction.
庳 combines 广 (building) with 卑, which likely contributes both sound and the idea of lowliness or humility, suggesting a low-built house.
The building enclosure 广 wraps around 卑, a shape associated with lowliness. Picture a humble, low-built house that sits close to the ground.
For ヒ, imagine a low-built house where you have to duck to enter, making a soft 'hee' sound as you bend down: hee -> ヒ.