Where does “topnøgle” come from?

topnøgle (Danish) comes from Danish nøgle, from Old Norse hnykill, from Proto-Germanic hnukkaz, from Proto-Indo-European knewg-, from Proto-Indo-European ḱen- — to set oneself in motion, arise.

topnøgle (Danish): socket wrench, ratchet wrench

Definitions

socket wrench, ratchet wrench

Ancestry of “topnøgle”, step by step

topnøgle traces back through two separate lines of ancestry.

via Danish nøgle

Step	Language	Word	Meaning
1	Danish	nøgle	key; clef; ball
2	Old Norse	hnykill	swelling
3	Proto-Germanic	hnukkaz	—
4	Proto-Indo-European	knewg-	to turn, press; to bend, pinch; to press; bend
5	Proto-Indo-European	ḱen-	to set oneself in motion, arise

via Danish top

Step	Language	Word	Meaning
1	Danish	top	summit, peak; hairpiece; top
2	Old Norse	toppr	tuft of hair, forelock
3	Proto-Germanic	tuppaz	tuft, plait; top, summit
4	Proto-Indo-European	dumb-	tail, rod, staff, pole, penis; tail, rod, staff,...

Every word from Proto-Indo-European ḱen- →Every word from Proto-Indo-European knewg- →Every word from Proto-Germanic hnukkaz →