This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
The exact historical development of 朇 is uncertain. It visually combines 會 and 卑, but the original semantic or phonetic role of these components is unclear.
The left side 會 suggests meeting or gathering, and the right side 卑 suggests lowliness. Picture a humble gathering where people help each other, but the exact meaning is uncertain.
For ヒ, imagine a humble person saying 'hee' in surprise when helped: hee -> ヒ.