nogn–, r. to bind, to tie, to attach; binding, tie, link.
etymology: A variant of arc neg– "natural knot, tangled clump, small and compact ball, knuckle, protuberance", or a combination of that with gign– "to tread, to step on, to set foot on; track, footprint", with vowel change (e → o) influenced by /ŋ/.