Focus on the pronunciation of antithesis
English definition of “antithesis”
/ænˈtɪθ·ə·sɪs/ n [C/U] (plural antitheses /ænˈtɪθ·əˌsiz/)
› the exact opposite, or opposition: [C] The relaxed company management is the antithesis of a formal bureaucracy. › literature In formal argument, the antithesis is the opposite of the thesis (= the main idea).