IPA: /ˌdaɪəˈmɛtrəl/
KK: /daɪəˈmɛtrəl/
Relating to or situated at opposite ends of a diameter; completely opposite or contrary.
The two teams had diametral views on how to approach the project.
Diametral → It is formed from "dia-" (meaning through or across) and "metron" (meaning measure). The word "diametral" refers to something that relates to or is situated along a diameter, which is a measure across a circle.
Think of something that goes 'across' ('dia-') a circle, which is measured by the 'diameter' — that's why diametral relates to the diameter.