Where does “шлемофон” come from?

шлемофон (Russian) comes from Russian шлем, from Old Church Slavonic шлѣмъ, from Proto-Slavic šelmъ, from Proto-Germanic helmaz, from Proto-Germanic halmaz, from Proto-Indo-European ḱolh₂mos, from Proto-Indo-European ḱelh₂- — to pierce, strike; to stick; prick; stab.

шлемофон (Russian): headset, helmet

Definitions

  1. headset, helmet

Ancestry of “шлемофон”, step by step

StepLanguageWordMeaning
1Russianшлемhelmet; headpiece
2Old Church Slavonicшлѣмъhelmet
3Proto-Slavicšelmъhelmet
4Proto-Germanichelmazhelmet
5Proto-Germanichalmazhalm; stem; stalk; straw; hay
6Proto-Indo-Europeanḱolh₂mosstalk
7Proto-Indo-Europeanḱelh₂-to pierce, strike; to stick; prick; stab
Every word from Proto-Indo-European ḱelh₂- →Every word from Proto-Indo-European ḱolh₂mos →Every word from Proto-Germanic halmaz →