least effort(n = noun.act) least resistance - the least effortful way to do something;
is a kind of effort, elbow grease, exertion, sweat, travail

at least, at the least, effort, fund-raising effort, in the least, joint effort, last but not least, last not least, least, least bittern, least common multiple, least of all, least resistance, least sandpiper, least shrew, least squares, line of least resistance, method of least squares, new world least weasel, old world least weasel, path of least resistance, the least bit, waste of effort