The meaning of Effortfulness and additional information.

Effort(n.) An exertion of strength or power, whether physical or mental, in performing an act or aiming at an object; more or less strenuous endeavor; struggle directed to the accomplishment of an object; as, an effort to scale a wall.

Effort(n.) A force acting on a body in the direction of its motion.

Effort(v. t.) To stimulate.