1
diametrically opposed to sth
用于强调两者完全对立，常接 to 引出对比对象。
Her views are diametrically opposed to mine.
她的观点与我的截然相反。
完全地；截然地
先理解核心含义，再看它在真实句子里的用法。
完全地；截然地
completely; utterly
Her views are diametrically opposed to mine.
她的观点与我的截然相反。
常修饰 opposed、opposite、different 等，表示强烈对立。
在直径上,正好位于相反的一侧。
Separated by a diameter, on exactly the opposite side.
The two restaurants offer diametrically opposite styles of cooking.
这两家餐厅提供的烹饪风格截然相反。
My dad and I have diametrically different tastes in music.
我爸爸和我在音乐方面的品味完全不同。
The report's conclusions are diametrically opposed to what the manager expected.
报告的结论与经理的预期截然相反。
用于强调两者完全对立，常接 to 引出对比对象。
Her views are diametrically opposed to mine.
她的观点与我的截然相反。
可表示空间上的正对面，也可比喻立场、观点完全相反。
They stood at diametrically opposite ends of the room.
他们站在房间完全相反的两端。
强调差异达到极点，常与 from 搭配。
The two methods are diametrically different from each other.
这两种方法完全不同。
Not this
Their views are diametric opposite.
Use this
Their views are diametrically opposite.
opposite 是形容词，需要用副词 diametrically 修饰；diametric 是形容词，不能放在形容词前作状语。
Not this
His opinion is diametrically opposed with mine.
Use this
His opinion is diametrically opposed to mine.
be opposed to 是固定搭配，表示“与……相反/反对”，介词用 to，不用 with。
Not this
I diametrically agree with you.
Use this
I completely agree with you.
diametrically 通常修饰 opposed、opposite、different 等表示“完全（相反）”，不能用来强调“完全同意”；表达完全同意应用 completely。
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
截然相反的；针锋相对的
Their views on education are diametrically opposed.
他们对教育的看法截然相反。
正好相反的；完全相反的
The two candidates took diametrically opposite positions on tax reform.
两位候选人在税收改革问题上采取了完全相反的立场。
完全不同的；截然不同的
The witnesses gave diametrically different descriptions of the same event.
目击者对同一事件的描述截然不同。
正相对的两个点；直径两端相对的点
On a clock face, the numbers 12 and 6 are at diametrically opposite points.
在钟面上，数字12和6位于正相对的位置。
截然相反的；针锋相对的
Their views on education are diametrically opposed.
他们在教育问题上的观点截然相反。
完全相反的；正好相反的
The two candidates stand diametrically opposite on most issues.
这两位候选人在大多数问题上立场完全相反。
Use diametrically naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
diameter（直径）的两端距离最远，看到diametrically就想到“在直径两端”，即“完全相反、截然地”。
语域：formal 常见场景：正式写作、学术讨论、公开演讲 该词为较正式用词，多用于书面语或正式场合，尤其常见于 diametrically opposed/opposite 结构中，表示‘完全相反’；日常口语中较少使用。
真正押韵（重读音节 -mɛt- 起及其后音相同）：metrically, symmetrically, asymmetrically, geometrically。注意 diabolically 和 dialectically 虽以 dia- 开头，但重读音节和后续音不同，不押韵，是易混词。
Dictionary facts from ECDICT, WIKTIONARY.