This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
箻 combines 竹 (bamboo) with 律, which likely contributes the sound. The exact historical development and original meaning are uncertain.
The top 竹 suggests bamboo, and the bottom 律 suggests law or rhythm. Picture a bamboo flute used to keep rhythm in a ceremony, but the true meaning is unknown.
For リツ, imagine a bamboo ruler (律) measuring rhythm: the reading リツ comes from 律, which is the bottom component.
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