7th earthly branch: 11 a.m.-1 p.m., noon, 5th solar month (6th June-6t
Pictograph of a pestle used for pounding rice, now written as 杵. The current meaning "noon" is a phonetic loan.
《說文》：“午，啎也。五月陰氣午逆陽，冒地而出。此予矢同意。”
pestle