This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
郥 is a rare character combining 貝 (shell/money) and ⻏ (village/city). The exact historical development and original meaning are uncertain.
The left side 貝 suggests shells or money, and the right side ⻏ suggests a village. Picture a village treasury where shells are stored, but the meaning is unclear.
For ハイ, imagine a high-piled stack of shells in the village: high -> ハイ.