Where does “arm” come from?

arm (Scots) comes from Middle English arm, from Old English earm, from Proto-West Germanic arm, from Proto-Germanic armaz, from Proto-Indo-European h₂ermos, from Proto-Indo-European h₂er- — to fit, to fix, to put together.

arm (Scots): arm; arm of the sea; bar, beam

Definitions

  1. arm; arm of the sea; bar, beam

Ancestry of “arm”, step by step

arm traces back through two separate lines of ancestry.

via Middle English arm

StepLanguageWordMeaning
1Middle Englisharmarm; poor; miserable, wretched
2Old Englishearmarm; poor, miserable
3Proto-West Germanicarmarm; poor, miserable; pitiful, pitiable
4Proto-Germanicarmazarm; poor, miserable; pitiful, pitiable
5Proto-Indo-Europeanh₂ermos
6Proto-Indo-Europeanh₂er-to fit, to fix, to put together

via Old Norse armr

StepLanguageWordMeaning
1Old Norsearmrarm; poor, unhappy; wretched, wicked
Every word from Proto-Indo-European h₂er-Every word from Proto-Indo-European h₂ermosEvery word from Proto-Germanic armaz