to defeat, to spoil or be spoiled, to corrupt or be corrupted
贁 centers on ruin and corruption: defeating someone, spoiling something, or being corrupted. The meanings share the idea of something being broken down or made worthless.
贁 is a rare character. It appears to combine 貝 (shell, money) doubled with 攵 (action hand), suggesting the idea of striking or breaking valuables, leading to ruin or corruption. The exact historical development is uncertain.
Two shells (貝) being struck by a hand holding a stick (攵) — imagine smashing precious shells, spoiling them completely. That is defeat and corruption.
For ハイ, picture a high stack of shells being smashed: high -> ハイ, and the high pile comes crashing down in ruin.