imperviableadjective · Level 3 SAT1not admitting of passage or capable of being affectedThe dense clay soil was nearly imperviable to water, flooding the fields after each storm.ModuleLevel 3RegisteracademicCollectionCollection 049SAT Complete planAlso in Collection 049avertible, impermanent, swinish, sensible, obese, exultant, insatiate, splendiferous and 1 more