Ef"fort (?), n. [F. effort, OF. esfort, for esfors, esforz, fr. esforcier. See Efforce.] 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.

2. (Mech.) A force acting on a body in the direction of its motion. Rankine.

Syn. -- Endeavor; exertion; struggle; strain; straining; attempt; trial; essay. See Attempt.

Ef"fort, v. t. To stimulate. [Obs.] "He efforted his spirits." Fuller.

• The amount of work involved in achieving something; exertion.
  
• An endeavour.