Where does “乙亥” come from?

乙亥 (Japanese) comes from Japanese 亥, from Japanese 猪, from Japanese の, from Old Japanese の, from Middle Chinese 能 — talent, ability.

乙亥 (Japanese): Wood Boar, the twelfth term of the sexagenary cycle

Definitions

  1. Wood Boar, the twelfth term of the sexagenary cycle

Ancestry of “乙亥”, step by step

乙亥 traces back through two separate lines of ancestry.

via Japanese 亥

StepLanguageWordMeaning
1Japanese亥the Boar, the twelfth of the twelve Earthly Branches
2Japanese猪a wild boar, "Sus scrofa"; a pig or wild boar;...
3Japaneseのgenitive case marker; nominative case marker in a...
4Old Japaneseのplain, field
5Middle Chinese能talent, ability

via Japanese 乙

StepLanguageWordMeaning
1Japanese乙something B; a stupid person, someone who is slow...
2Middle Chinese乙—
Every word from Middle Chinese 能 →Every word from Old Japanese の →Every word from Japanese の →