The saliva, spit or food particles that have flowed back into a drink after someone has drunk from it.
The backward flow of water from oars or propeller or breaking waves.
The situation where economic growth in one area harms other areas by attracting people and business away from those areas.
The similar flow of air from an aircraft engine.
The result or consequence of an event; an aftermath.
To affect with backwash.
To clean the oil from wool after combing.
To operate a water filter in the reverse direction in order to clean it.
A liquid that has been percolated.
To pass a liquid through a porous substance; to filter.
To make (coffee) in a percolator.
To drain or seep through a porous substance.
To spread slowly or gradually; to slowly become noticed or realised.