居
キョ, コ, い.る, い, お.る, おき, ぐ, すえ
reside, to be, exist, live with
JLPT3 G5 S8 F836
古
# hard +
尸
buttocks → seat oneself on a hard surface → settle/set in place → *be present* → *exist* (compare
有
,
在
, and
存
) → *stay*; *live*.
[Full Kanji Etymology List]