副詞 diametrically:

1. as from opposite ends of a diameter

1. Any two places or regions that are on diametrically opposite sides of the earth.
   對跖地，對踵點地球上處于正相對位置和兩個地點或地區(qū)
2. I regret to say we're diametrically opposed to your ideas.
   很遺憾我只好說我們完全不同意你們的意見。
3. A point on the celestial sphere directly below the observer, diametrically opposite the zenith.
   天底天球上，在觀測者垂直向下的一點，與天頂完全相對