salary in rice
禀 centers on receiving a formal allowance, specifically a salary paid in rice. It conveys the idea of a granted stipend or ration.
禀 combines 㐭 (granary) with 示 (altar, show), suggesting grain from a granary being distributed or presented. The exact historical development is uncertain, but the character is associated with official grain stipends.
The top 㐭 looks like a granary, and the bottom 示 suggests something shown or given. Picture a granary dispensing rice as a salary: 禀 is a rice salary.
For リン, imagine a line of workers receiving their rice salary: line -> リン, and each person gets their allotted rice.