Jubilation!

Today I feel jubilant! It means joyful! The verb form is jubilate, as in 'Let's jubilate!" I don't think I've ever heard anyone ever say that."Let's Celebrate," is a more common way of expressing the same thing. The noun form is Jubilation.

All these words are from Latin, "jubulare," which means to raise a shout of joy!

Rejoice!