Where does “supereminent” come from?

supereminent (Middle French) comes from Latin supereminens, from Latin supereminere — present active infinitive of superēmineō.

Ancestry of “supereminent”, step by step

Step	Language	Word	Meaning
1	Latin	supereminens	overtopping
2	Latin	supereminere	present active infinitive of superēmineō

supereminent — Etymology, Origin & Word History | Etymology Explorer