gigantic strength, Hercules
屭 centers on immense physical power, likened to the strength of the mythical hero Hercules. It conveys the idea of gigantic, almost superhuman force.
屭 is a rare character combining 尸 (a body or dwelling) with 贔 (a triple 貝 form associated with great strength or burden). The exact historical development is uncertain, but it likely expresses the idea of a body possessing enormous power.
The outer 尸 suggests a strong body, and inside it contains 贔, a triple stack of 貝 (shells/money) that looks heavy and powerful. Imagine a body so strong it can carry three massive loads of treasure at once—that is gigantic strength.
For キ, picture a mighty key that unlocks Hercules' strength: key -> キ, and turning that key fills the body with gigantic power.