在
ザイ, あ.る, あり

exist, outskirts, suburbs, located in

JLPT3 G5 S6 F211

The relevant seal inscription form is 才# cut off + 土 earth → pile earth to cut off the flow of a river. *Be*, *exist*, *location*, *stay*, *be alive*, and *in* are extended meanings (← be fixed firmly in one place; compare 居, 有, and 存) → *country(side)* (← permanence of rural abodes).

[Full Kanji Etymology List]