spur

a verbalization that encourages you to attempt something; "the ceaseless prodding got on his nerves"

any sharply pointed projection

tubular extension at the base of the corolla in some flowers

a sharp prod fixed to a rider's heel and used to urge a horse onward; "cowboys know not to squat with their spurs on"

a railway line connected to a trunk line

incite or stimulate; "The Academy was formed to spur research"

give heart or courage to

strike with a spur

goad with spurs; "the rider spurred his horse"

equip with spurs; "spur horses"