antithetical also antithetic
an-ti-thet-i-cal / ăn-tĭ-thĕt-ĭ-kəl
or an-ti-thet-ic / ăn-tĭ-thĕt-ĭk adjective 1. completely opposite Civilization and violence are antithetical concepts. Martin Luther King, Jr., 1929 - 1968 2. marked by direct opposition What an antithetical mind! -- tenderness, roughness -- delicacy, coarseness -- sentiment, sensuality -- soaring and groveling, dirt and deity -- all mixed up in that one compound of inspired clay! Lord Byron, 1788- 1824