binarchy

The story

1. Ancient Greek · derived from-αρχία“-archy: rule”
2. Latin · derived frombīnī“twin”
3. French · derived frombinarchie
4. English todaybinarchy

From French binarchie, from Latin bīnī (“twin”) + -archia (“-archy”), from Ancient Greek -αρχία (-arkhía, “-archy: rule”).