This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
簶 combines 竹 (bamboo) with 禄, which likely contributes the sound ロク. The exact historical development and original meaning are uncertain.
The top 竹 suggests bamboo, and the bottom 禄 is associated with blessings or salary. Imagine a bamboo tally used to record blessings, but its exact meaning is unclear.
For ロク, picture a bamboo lock (ロック) securing a record of blessings: lock -> ロク, tying the sound to the bamboo top.
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