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oppositional [noun]
作定语，常修饰表示立场、态度、行为等的名词。
The newspaper took an oppositional stance toward the reform.
这家报纸对改革采取了对抗的立场。
反对的；对抗的
先理解核心含义，再看它在真实句子里的用法。
反对的；对抗的
opposing or resisting; expressing opposition
The newspaper took an oppositional stance toward the reform.
这家报纸对改革采取了对抗的立场。
属于、关于或表现对立的。
Of, pertaining to, or exhibiting opposition.
Her oppositional attitude made it hard for the team to reach an agreement.
她对抗的态度让团队很难达成一致。
The two managers had oppositional views on the new policy, so they called in a mediator.
两位经理对新政策持对立的观点，于是请来了调解人。
As a teenager, he became more oppositional and often argued with his parents.
到了青春期，他变得更加逆反，经常和父母争吵。
作定语，常修饰表示立场、态度、行为等的名词。
The newspaper took an oppositional stance toward the reform.
这家报纸对改革采取了对抗的立场。
作表语，描述主语持反对或对抗态度。
Their attitude is simply oppositional.
他们的态度纯粹是唱反调。
与 become 连用，表示转入对抗或反对状态。
He becomes oppositional whenever the topic is raised.
每当提到这个话题，他就变得针锋相对。
Not this
His oppositional to the plan was clear.
Use this
His opposition to the plan was clear.
oppositional 是形容词，表示“对抗的”，不能作名词；这里需要名词 opposition（反对）来作主语。
Not this
The child has opposite defiant disorder.
Use this
The child has oppositional defiant disorder.
表示“对立违抗障碍”时，固定病名是 oppositional defiant disorder，其中 oppositional 意为“对抗的、对立的”，不能用 opposite（相反的）替代。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
对立违抗障碍
The child was diagnosed with oppositional defiant disorder.
这个孩子被诊断出患有对立违抗障碍。
对抗行为
His oppositional behavior made it hard for teachers to manage the class.
他的对抗行为使老师很难管理课堂。
反对立场
She took an oppositional stance to the proposed policy.
她对提议的政策采取了反对立场。
对抗态度
An oppositional attitude can hinder constructive discussion.
对抗态度会妨碍建设性讨论。
对立思维
Oppositional thinking often oversimplifies complex issues.
对立思维往往将复杂问题简单化。
Use oppositional naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
联想 opposite（对立）和 position（位置）：站在对立位置的姿态，就是 oppositional（反对的、对抗的）。
语域：formal 常见场景：政治讨论、心理学术语 oppositional 属于较正式用词，多出现在心理学术语（如 oppositional defiant disorder）或政治评论中，日常口语较少使用。
与 oppositional 押韵的单词包括 positional、propositional、compositional、transitional，它们的重音都在 /zɪ/ 上，末尾都是 /ˈzɪʃənəl/。Traditional 和 conditional 拼写也含 -itional，但重音在 /dɪ/，发音不同，不押韵。
Dictionary facts from ECDICT, WIKTIONARY.