Where does “треножиться” come from?

треножиться (Russian) comes from Russian трено́жить, from Russian трено́га, from Russian нога́, from Old East Slavic нога, from Proto-Slavic nogà, from Proto-Indo-European h₃nogʰ- — claw, nail; nail.

Ancestry of “треножиться”, step by step

StepLanguageWordMeaning
1Russianтрено́житьto hobble
2Russianтрено́гаtripod a three-legged stand or mount
3Russianнога́foot, leg; legs; leg
4Old East Slavicногаleg
5Proto-Slavicnogàfoot, leg
6Proto-Indo-Europeanh₃nogʰ-claw, nail; nail
Every word from Proto-Indo-European h₃nogʰ- →Every word from Proto-Slavic nogà →Every word from Old East Slavic нога →