This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
慲 combines 忄 (heart/mind) with 㒼, but the exact historical development and original meaning are uncertain.
The heart radical 忄 beside 㒼 suggests a state of mind, but without a clear meaning, picture a heart covered by a lid (㒼) — perhaps forgetting or concealing feelings.
For バン, imagine a ban on remembering: ban -> バン, and the heart forgets under the lid.