1. (v. t.) To exert physical or intellectual strength for the attainment of; to use efforts to effect; to strive to achieve or reach; to try; to attempt.

2. (v. i.) To exert one's self; to work for a certain end.

3. (n.) An exertion of physical or intellectual strength toward the attainment of an object; a systematic or continuous attempt; an effort; a trial.

accept accomplished fact accomplishment achievement act acta action address adventure aim aim to apply approach aspire assay assume attack attempt attempt to be determined bid blow buckle down buckle to coup crack dare to dealings deed determine doing doings effort elbow grease embark in embark upon energy engage in enter on enter upon enterprise essay exertion experiment exploit fait accompli fall into fall to feat fling gambit gest get under way go go about go all out go at go in for go into go upon hand handiwork hard pull hassle have at hump hump it intend job knuckle down labor launch forth launch into lay about lay to lick long pull make an effort maneuver measure might and main move move into muscle nerve and sinew offer operation overt act pains passage performance pitch into plunge into ply the oar pretend to proceed to proceeding production purpose push res gestae resolve seek seek to set about set at set forward set going set to shot spare no effort stab step strain strive strive to striving stroke strong bid struggle study study to stunt sweat sweat blood tackle take on take up tentative thing thing done toil tour de force transaction travail trial trial and error trouble try try and try to turn turn to undertake undertaking venture venture to venture upon whack work works