亥
ガイ, カイ, い, り

sign of the hog, 9-11PM, twelfth sign of the Chinese zodiac

JLPT1 G13 S0 F5000

A depiction of a pig/boar stretched taut for slaughter on a frame. *Boar* (as the *twelfth sign of the Chinese zodiac*), *twelfth* and *9 P.M. to 11 P.M.* are borrowed meanings.

[Full Kanji Etymology List]