Where does “акула” come from?

акула (Kazakh) comes from Russian аку́ла, from Old Norse hákarl, from Old Norse Karl, from Proto-Norse ᚲᚨᚱᛁᛚᚨᛉ, from Proto-Germanic karilaz, from Proto-Germanic karaz, from Proto-Indo-European ǵerh₂- — to grow old, to mature.

акула (Kazakh): shark

Definitions

shark

Ancestry of “акула”, step by step

Step	Language	Word	Meaning
1	Russian	аку́ла	shark
2	Old Norse	hákarl	a shark
3	Old Norse	Karl	man
4	Proto-Norse	ᚲᚨᚱᛁᛚᚨᛉ	—
5	Proto-Germanic	karilaz	free man, franklin; little man, young man
6	Proto-Germanic	karaz	—
7	Proto-Indo-European	ǵerh₂-	to grow old, to mature

Every word from Proto-Indo-European ǵerh₂- →Every word from Proto-Germanic karaz →Every word from Proto-Germanic karilaz →