an‧ti‧thet‧i‧cal /ˌæntɪˈθetɪk
əl/ (
also an‧ti‧thet‧ic /-ˈθetɪk◂/)
adjective formal exactly opposite to something
antithetical to
This violence is completely antithetical to the teaching of the church. [TahlilGaran] Dictionary of Contemporary English ▲