shewage

From Middle English schewage, from Anglo-Norman escavage, escauwage, alteration of earlier escauvinghe (“scavage”), from Middle English shewing, schewing (“inspection, examination, show”), from Old English sċēawung (“a looking at, seeing, contemplation, consideration, respect, regard, reconnoitering, surveying, inspection, examination, scrutiny, a spectacle, show, appearance, pretence, a showing, exhibiting, manifestation, toll on exposure of goods”), equivalent to show + -ing. Doublet of scavage.

来源：wiktionary