collect, small administration
酇 centers on gathering people or resources into a defined unit: collecting together or forming a small administrative district.
酇 combines 贊 (likely contributing sound and the idea of gathering or assisting) with ⻏ (a mound or settlement), suggesting a place where people are collected or administered.
The left side 贊 suggests gathering or supporting, and the right side ⻏ is a settlement. Picture a village where people are collected together for a small local administration.
For サン, imagine a small administrative office under the sun: sun -> サン, and the sun shines on the collected village.