antithetical
UK: ˌæntɪˈθetɪkəl | US: ˌæntɪˈθetɪkəl
adj. directly opposed or contrasted; mutually incompatible
adj. involving or using antithesis (a rhetorical device of contrasting ideas)
The word "antithetical" originates from Greek antithetikos, combining anti- ("against") and tithenai ("to place"). It reflects the idea of setting opposing ideas side by side, a core concept in rhetoric (e.g., "love is antithetical to hate"). Over time, it broadened to describe any stark contrast or incompatibility.
His views are antithetical to the principles of democracy.
The two theories are antithetical and cannot coexist.
Her cheerful demeanor was antithetical to the gloomy atmosphere.
The artist’s style is antithetical to traditional techniques.
Their goals proved antithetical, leading to constant conflict.