IPA: /ˌdaɪəˈmɛtrɪkəl/
KK: /daɪəˈmɛtrɪkəl/
Completely opposite or contrasting; relating to a diameter.
The two teams had diametrical views on how to approach the project.
Diametrical → It is formed from "dia-" (meaning through or across) and "metron" (meaning measure). The word describes something that is directly opposite or across from something else, often in a geometric context.
Think of something that goes 'across' ('dia-') and is a 'measure' ('metron') — this helps you remember that 'diametrical' refers to being directly opposite.