I. ˈ ̷ ̷ˌ ̷ ̷ noun
Etymology: back (III) + wash
1.
a. : the motion of water or waves washed or thrown back (as by the propeller or oars of a boat)
b. : a backward flow or movement (as of air or matter) produced by and incidental or residual to some action or process
the turbojet generates a backwash of such high velocity that the conventional wooden fences blow away — Boeing Magazine
2. : a condition, movement, or event that is a reaction to or an extension, consequence, or by-product of some other event or development : sequel , aftermath , repercussion
the backwash of English deism reached the shores of New England — V.L.Parrington
Australians should have no fear of their ability to weather the backwash of an American recession — Sydney (Australia) Bulletin
economic and social problems … are by no means the mere backwash of war and German occupation — Robert Strausz-Hupé
3. : backwater 4
an unspoiled rural paradise — called by some a backwash of eighteenth century manners and customs — American Guide Series: Delaware
II. transitive verb
1. : to affect with backwash
a steamer backwashing our small craft
2. : to scour and dry (wool) in sliver form before or after combing
3. : to clean (a water filter) by reversing the flow
• back·wash·er -shə(r) noun