Where does “ridedyr” come from?

ridedyr (Norwegian Nynorsk) comes from Norwegian Nynorsk ride, from Norwegian Nynorsk rida, from Old Norse ríða, from Proto-Germanic rīdaną, from Proto-Indo-European rēydʰ-, from Proto-Indo-European h₂er- — to fit, to fix, to put together.

ridedyr (Norwegian Nynorsk): a mount, an animal that can be ridden

Definitions

a mount, an animal that can be ridden

Ancestry of “ridedyr”, step by step

ridedyr traces back through two separate lines of ancestry.

via Norwegian Nynorsk ride

Step	Language	Word	Meaning
1	Norwegian Nynorsk	ride	Alternative form of rida
2	Norwegian Nynorsk	rida	to ride an animal
3	Old Norse	ríða	to ride
4	Proto-Germanic	rīdaną	to ride
5	Proto-Indo-European	rēydʰ-	—
6	Proto-Indo-European	h₂er-	to fit, to fix, to put together

via Norwegian Nynorsk dyr

Step	Language	Word	Meaning
1	Norwegian Nynorsk	dyr	an animal; expensive; dear
2	Old West Norse	dýr	—
3	Proto-Germanic	deuzą	animal, beast
4	Proto-Indo-European	dʰewsóm	living thing
5	Proto-Indo-European	dʰéws	breath
6	Proto-Indo-European	dʰwes-	to breathe; breath; spirit, soul > creature

Every word from Proto-Indo-European h₂er- →Every word from Proto-Indo-European rēydʰ- →Every word from Proto-Germanic rīdaną →