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O.E. lagu (pl. laga, comb. form lah-), from O.N. *lagu "law," collective pl. of lag "layer, measure, stroke," lit. "something laid down or fixed," from P.Gmc. *lagan "put, lay" (see lay (v.)). Replaced O.E. æ and gesetnes, which had the same sense development as law. Cf. also statute, from L. statuere, Ger. Gesetz "law," from O.H.G. gisatzida, Lith. istatymas, from istatyti "set up, establish." Lawsuit is from 1624. Law and order have been coupled since 1796. Law-abiding is from 1859.