emperor
Depicts the calyx or sepals of a plant. Similar in origin to 不. Based on the original meaning "stem of a plant", now written as 蒂. The current meaning is a phonetic loan.
《說文》：“帝，諦也。王天下之號也。从丄，朿聲。，古文帝。古文諸丄字皆从一，篆文皆从，，古文上字。”
stem of a plant