Where does “int-” come from?

int- (Old Dutch) comes from Proto-Germanic in-, from Proto-Indo-European indʰro-, from Proto-Indo-European oyd- — to swell.

Ancestry of “int-”, step by step

StepLanguageWordMeaning
1Proto-Germanicin-strong
2Proto-Indo-Europeanindʰro-swelling; strong
3Proto-Indo-Europeanoyd-to swell

Words derived from “int-”

Every word from Proto-Indo-European oyd- →Every word from Proto-Indo-European indʰro- →Every word from Proto-Germanic in- →