Where does “Crack” come from?

Crack (German) comes from English crack, from Middle English crak, from Old Norse kráka, from Proto-Germanic *krakǭ, from Proto-Germanic krakōną, from Proto-Indo-European ǵerh₂- — to grow old, to mature.

Crack (German): crack; highly trained and competent person;...

Definitions

crack; highly trained and competent person;...

Ancestry of “Crack”, step by step

Step	Language	Word	Meaning
1	English	crack	To form cracks; To break apart under pressure; To...
2	Middle English	crak	loud conversation, bragging talk
3	Old Norse	kráka	crow
4	Proto-Germanic	*krakǭ	—
5	Proto-Germanic	krakōną	to crack; crackle; shriek
6	Proto-Indo-European	ǵerh₂-	to grow old, to mature

Every word from Proto-Indo-European ǵerh₂- →Every word from Proto-Germanic krakōną →Every word from Proto-Germanic *krakǭ →