French word approuver comes from Latin probo, Latin ad ((direction) toward, to, on, up to, for.)

Detailed word origin of approuver

Dictionary entry	Language	Definition
probo	Latin (lat)	I acquit, exonerate. I approve, commend. I demonstrate, prove. I test, inspect.
ad	Latin (lat)	(direction) toward, to, on, up to, for.
approbo	Latin (lat)	I make evident, prove, demonstrate, confirm, establish,like. I regard as good, approve, favor or favour, commend, endorse.. I render acceptable or satisfactory.
approuver	French (fra)	To approve (of).

Words with the same origin as approuver