Toil \Toil\, v. i. [imp. & p. p. {Toiled}; p. pr. & vb. n. {Toiling}.] [OE. toilen to pull about, to toil; of uncertain origin; cf. OD. teulen, tuylen, to labor, till, or OF. tooillier, toailler, to wash, rub (cf. {Towel}); or perhaps ultimately from the same root as E. tug.] To exert strength with pain and fatigue of body or mind, especially of the body, with efforts of some continuance or duration; to labor; to work.