As a noun wacke
is a soft, earthy, dark-coloured rock or clay derived from the alteration of basalt.
As an adjective wacken is
watchful.
wacke
English
Noun
(geology) A soft, earthy, dark-coloured rock or clay derived from the alteration of basalt.
Synonyms
* wacky
Related terms
* graywacke, greywacke
References