litigation Look up litigation at Dictionary.com
1560s, "disputation," from L.L. litigationem (nom. litigatio), from L. litigatus, pp. of litigare "to dispute, quarrel, strive," from litem (nom. lis, gen. litis) "lawsuit, dispute, quarrel, strife" + root of agere "to drive, conduct" (see act). Meaning "act of carrying on a lawsuit" is from 1640s.