cracking

nouns

a sudden sharp noise
"the crack of a whip"; "he heard the cracking of the ice"; "he can hear the snap of a twig"
is derived from
the act of cracking something
is derived from
the process whereby heavy molecules of naphtha or petroleum are broken down into hydrocarbons of lower molecular weight (especially in the oil-refining process)
is derived from
is derived from
is a type of (narrower)
(chemistry) any process determined by the atomic and molecular composition and structure of the substances involved

adjectives

very good
"he did a bully job"; "a neat sports car"; "had a great time at the party"; "you look simply smashing"