1. 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. We prize the stronger effort of his power. (Pope)
2. (Science: mechanics) a force acting on a body in the direction of its motion.
Synonym: endeavor, exertion, struggle, strain, straining, attempt, trial, essay. See attempt.
Origin: f. Effort, OF. Esfort, for esfors, esforz, fr. Esforcier. See Efforce.