From Old English 'cracian' (to make a sharp noise), from Proto-Germanic *krakōną — onomatopoeic in origin.
A line on a surface where it has split without breaking apart; a sudden sharp noise.
From Old English 'cracian' meaning 'to make a sharp noise, to resound,' from Proto-Germanic *krakōną, of imitative origin mimicking a sharp, sudden sound. Key roots: *krakōną (Proto-Germanic: "to crack (imitative)").