Where does “-ig” come from?

-ig (Old High German) comes from Proto-West Germanic -g, from Proto-Germanic -gaz, from Proto-Indo-European -ḱos — -y, -ic.

Ancestry of “-ig”, step by step

StepLanguageWordMeaning
1Proto-West Germanic-gForms adjectives from nouns and verbs with a...
2Proto-Germanic-gaz-y
3Proto-Indo-European-ḱos-y, -ic

Words derived from “-ig”

Every word from Proto-Indo-European -ḱos →Every word from Proto-Germanic -gaz →Every word from Proto-West Germanic -g →