Where does “カーネル” come from?

カーネル (Japanese) comes from English kernel, from Middle English kernel, from Old English cyrnel, from Proto-West Germanic *kurnil.

カーネル (Japanese): kernel

Definitions

Step	Language	Word	Meaning
1	English	kernel	The core, center, or essence of an object or...
2	Middle English	kernel	A seed, grain or stone of a fruit, corn, or nut;...
3	Old English	cyrnel	a kernel; a hard concretion in the flesh, an...
4	Proto-West Germanic	*kurnil	—