diametrically

/D AY0 AH0 M EH1 T R IH0 K AH0 L IY0/
adverb
  1. 1

    Separated by a diameter, on exactly the opposite side.

  2. 2

    (especially in the phrase diametrically opposed) Absolutely (in opposition).

Source: https://en.wiktionary.org/wiki/diametrically