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I. verb Etymology: Middle English, from Anglo-French ~er Date: 14th century transitive verb to cover or coat with soft adhesive matter ; plaster , to coat with a dirty substance, 3. to apply coloring material crudely to, to apply (as paint) crudely, intransitive verb to put on a false exterior, to apply colors crudely, ~er noun II. noun Date: 15th century material used to ~ walls, an act or instance of ~ing, something ~ed on ; smear , a crude picture