expiate

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ex·pi·ate / ˈekspēˌāt/ • v. [tr.] atone for (guilt or sin): their sins must be expiated by sacrifice.DERIVATIVES: ex·pi·a·ble / ˈekspēəbəl/ adj.ex·pi·a·tion / ˌekspēˈāshən/ n.ex·pi·a·tor / -ˌātər/ n.ex·pi·a·to·ry / ˈekspēəˌtôrē/ adj.