oppositional
🇺🇸
/ˌɑːpəˈzɪʃənl/
🇬🇧
/ˌɒpəˈzɪʃənl/
disagreeing strongly with someone or something
The student had an oppositional attitude towards the new school rules.
completely different from each other
The two artists had oppositional styles, one was abstract while the other was realistic.