Where does “extremely” come from?

Extremely derives from Middle English -ly adverbial suffix added to Latin extremus, meaning outermost, from Latin extra meaning outside, ultimately from Proto-Indo-European roots relating to comparison and position.

extremely (English): To an extreme degree

Definitions

  1. To an extreme degree

Ancestry of “extremely”, 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