sitting in the lotus position
跏 refers specifically to sitting in the lotus position, a cross-legged meditation posture.
跏 combines 足 (foot/leg) with 加, which likely contributes the sound カ. The character is used in the compound 跏趺 (かふ) for the lotus position, where the legs are crossed with feet resting on the thighs.
The left side 足 means foot or leg. Picture your legs adding (加) together into a crossed position: 跏 is sitting in the lotus position.
For カ, imagine a car (カ) parked with its wheels crossed like legs in the lotus position: car -> カ, and the crossed wheels mirror the crossed legs.
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half lotus position (meditation posture); sitting with one foot placed on the opposite thigh
statue of a figure sitting contemplatively in the half lotus position (often of Maitreya)
half lotus position (meditation posture); sitting with one foot placed on the opposite thigh
lotus position (meditation and yoga posture); padmasana; sitting with legs crossed and feet placed on opposing thighs
lotus position (meditation and yoga posture); padmasana; sitting with legs crossed and feet placed on opposing thighs