English word joyous comes from Old French joie (Joy (feeling of happiness or elation).), Old French -eus

Detailed word origin of joyous

Dictionary entry	Language	Definition
joie	Old French (fro)	Joy (feeling of happiness or elation).
-eus	Old French (fro)
joieus	Old French (fro)	Joyous; overjoyed.
joyous	English (eng)	Full of joy; happy.

Words with the same origin as joyous