Where does “rig” come from?

I notice there's a mismatch in your request: the chain provided traces "ring" (a circular object), but you've asked me to write about "rig" (equipment/apparatus) as the headword. I can write the etymology sentence for **ring** based on your chain: Ring comes from Middle English ring, from Old English hring, from Proto-Germanic hringijaną, ultimately from Proto-Indo-European sek-, meaning to cut or turn. However, if you need the etymology for **rig**, please provide the correct etymological chain, as the one given doesn't support that headword.

rig (English): The rigging of a sailing ship or other such...