Where does “nervesystem” come from?

nervesystem (Norwegian Nynorsk) comes from Norwegian Nynorsk system, from Ancient Greek σύστημα, from Ancient Greek -μᾰ, from Proto-Indo-European -mn̥ — Creates action nouns or result nouns from verbs.

nervesystem (Norwegian Nynorsk): nervous system

Definitions

nervous system

Ancestry of “nervesystem”, step by step

nervesystem traces back through two separate lines of ancestry.

via Norwegian Nynorsk system

Step	Language	Word	Meaning
1	Norwegian Nynorsk	system	a system
2	Ancient Greek	σύστημα	a whole made of several parts or members, system;...
3	Ancient Greek	-μᾰ	"suffix forming a noun denoting the result of an...
4	Proto-Indo-European	-mn̥	Creates action nouns or result nouns from verbs

via Norwegian Nynorsk nerve

Step	Language	Word	Meaning
1	Norwegian Nynorsk	nerve	nerve
2	Ancient Greek	νεῦρον	sinew, tendon; cord, of a slingshot, bowstring;...
3	Proto-Indo-European	snéh₁wr̥	sinew, tendon
4	Proto-Indo-European	(s)neh₁-	to spin (thread), to sew

Every word from Proto-Indo-European -mn̥ →Every word from Ancient Greek -μᾰ →Every word from Ancient Greek σύστημα →