to rely on
憀 centers on dependence: relying on someone or something for support. The given meaning is narrow, so treat it as a specific verb for leaning on another.
憀 combines 忄 (heart/mind) with 翏, which likely contributes the sound. The exact historical development is uncertain, but the structure suggests a phono-semantic compound where the heart radical relates to emotional or mental reliance.
The heart radical 忄 beside the complex 翏 suggests a feeling of needing support. Picture your heart leaning on a tall, sturdy structure (翏) for stability.
For リョウ, imagine relying on a friend named Ryo: Ryo -> リョウ, and your heart trusts him completely.