The middle english word ardent is derivative of old French and means of vehement disposition. Ardent mean to do something with fervor and or excitement. The word typically denotes a sense of urgency. 

Opening of The Communist Manifesto by Karl Marx

“I. Communism is already acknowledged by all European Powers to be itself a Power. 

II. It is high time that Communists should openly, in the face of the whole world, publish their views, their aims, their tendencies, and meet this nursery tale of the Spectre of Communism with a Manifesto of the party itself.”