Where does “diametrically” come from?

Diametrically is the adverbial form of diametric, from Middle English -ally, a suffix forming adverbs from adjectives.

diametrically (English): Separated by a diameter, on exactly the opposite...

Definitions

  1. Separated by a diameter, on exactly the opposite...

Ancestry of “diametrically”, step by step

StepLanguageWordMeaning
1English-lyUsed to form adjectives from nouns, the...
2EnglishgrislyHorrifyingly repellent; gruesome, terrifying;...
3Middle Englishgrisely
4Old Englishgrisliċgrisly, horrible; dreadful, horrid
5Old English-līċsuffix forming {{glossary|adjective}}s meaning...
6Proto-Germanic*-līk
Every word from Proto-Germanic *-līkEvery word from English -lyEvery word from Old English -līċ