Where does “lærebok” come from?

lærebok (Norwegian Bokmål) comes from Norwegian Bokmål lære, from Old Norse læra, from Middle Low German lēren, from Old Saxon lērian, from Proto-West Germanic laiʀijan, from Proto-Germanic laizijaną, from Proto-Indo-European loyséyeti, from Proto-Indo-European leys — to trace; to track.

lærebok (Norwegian Bokmål): textbook

Definitions

textbook

Ancestry of “lærebok”, step by step

lærebok traces back through two separate lines of ancestry.

via Norwegian Bokmål lære

Step	Language	Word	Meaning
1	Norwegian Bokmål	lære	education; dogma; study
2	Old Norse	læra	—
3	Middle Low German	lēren	—
4	Old Saxon	lērian	to teach
5	Proto-West Germanic	laiʀijan	to teach
6	Proto-Germanic	laizijaną	to teach
7	Proto-Indo-European	loyséyeti	—
8	Proto-Indo-European	leys	to trace; to track

via Norwegian Bokmål bok

Step	Language	Word	Meaning
1	Norwegian Bokmål	bok	a book; a beech
2	Danish	bøg	beech
3	Old Norse	bók	beech; textile fabric with figures woven in it;...

Every word from Proto-Indo-European leys →Every word from Proto-Indo-European loyséyeti →Every word from Proto-Germanic laizijaną →