(n.) The act of understating, or the condition of being understated; that which is understated; a statement below the truth.

abstractionism coloring deformation distortion exaggeration expressionism false coloring falsification garbling hyperbole inaccuracy injustice litotes miscoloring misdrawing mispainting misquotation misreport misrepresentation misstatement misteaching nonrealism overdrawing overstatement perversion quietness restrainedness restraint simplicity slanting subduedness twisting unobtrusiveness