Latin word aequo comes from Latin -one(-onem|m), Latin aequus (Calm. Equal. Fair, impartial. Just. Level, even.)

Detailed word origin of aequo

Dictionary entry	Language	Definition
-one(-onem|m)	Latin (lat)
aequus	Latin (lat)	Calm. Equal. Fair, impartial. Just. Level, even.
aequo	Latin (lat)	I become equal with.. I compare; I place on equal footing with.. I make equal to something else.. I make fair or right.. I make level or smooth.

Words with the same origin as aequo