Where does “arm-” come from?

arm- (Finnish) comes from Proto-Indo-European h₂er- — to fit, to fix, to put together.

Ancestry of “arm-”, step by step

StepLanguageWordMeaning
1Proto-Indo-Europeanh₂er-to fit, to fix, to put together

Words derived from “arm-

Every word from Proto-Indo-European h₂er-