Where does “informal” come from?

Informal derives from Middle English in- plus Latin -alis attached to Latin in, ultimately tracing to Ancient Greek μορφή and Proto-Indo-European en.

informal (English): Not formal or ceremonious; Not in accord with the...

Definitions

  1. Not formal or ceremonious; Not in accord with the...

Ancestry of “informal”, step by step

StepLanguageWordMeaning
1EnglishformalBeing in accord with established forms; Official;...
2Middle Englishformel
3Old Frenchformel
4Latinformālisformal
5French-ïsme-ism, variant of -isme following vowels
6Latin-ismaAlternative form of -ismus; -ism
7Latin-ismus-ism
8Ancient Greek-ισμόςForms abstract nouns
9Ancient Greek-μόςForms abstract nouns
10Proto-Indo-European-mósCreates action/result nouns from verb stems

Words derived from “informal

Every word from Proto-Indo-European -mós