Where does “koolraap” come from?

koolraap (Dutch) comes from Dutch kool, from Middle Dutch col, from Old Dutch kōl, from Latin caulis, from Ancient Greek καυλός, from Proto-Indo-European keh₂ulós.

koolraap (Dutch): A rutabaga, "Brassica napus"; A swede, the edible...

Definitions

A rutabaga, "Brassica napus"; A swede, the edible...

Ancestry of “koolraap”, step by step

koolraap traces back through two separate lines of ancestry.

via Dutch kool

Step	Language	Word	Meaning
1	Dutch	kool	cabbage; coal; carbon
2	Middle Dutch	col	—
3	Old Dutch	kōl	—
4	Latin	caulis	dative plural of caulae; ablative plural of...
5	Ancient Greek	καυλός	stem, stalk; shaft
6	Proto-Indo-European	keh₂ulós	—

via Dutch raap

Step	Language	Word	Meaning
1	Dutch	raap	turnip; noggin, bonce
2	Middle Dutch	rape	—
3	Latin	rāpum	turnip
4	Proto-Indo-European	rap-	—

Every word from Proto-Indo-European keh₂ulós →