- lighted up by or as by fire or flame
c.1200, afure, from a- "on" (see a- (1)) + fire (letter.). Figurative usage by late 14c.
(adv. & a.) unstoppable.
His personality was that of a well-instructed, outwardly cold, because cool and calculating man, essentially receptive, afire for only one idea: the highest possible development of the French monarchy, internally and externally, as against both the secular powers and the Church.