You don\’t know what dark is until you\’ve been in a coal mine without a light.
Immure — To wall in, surround with a wall or walls; to fortify
Kozintsev’s opening scene shows the castle drawbridges being raised to immure the inhabitants in a labyrinth of intrigue, espionage and surveillance.
Magazine article by Peter Conrad; New Statesman, Vol. 132, May 5, 2003.
Ideation — The formation of mental images of things not present to the senses. OED
Example: Christopher Miller: The opportunities for creative thought and idea-creation in organizational life are endless. We have used ideation as a tool on issues ranging from vision creation to tax management. — The Futurist Magazine
Trenchant — Having a keen edge, sharp.
Dancer-choreographer Maida Withers, Washington’s leading conceptual artist, has devoted the past 25 years to creating multimedia projects distinguished by their intellectual thrust and trenchant imagination. — Jean Battey Lewis, Washington Times