maculate — to make dirty or spotted; to stain or defile

a young artist accidentally knocks over a jar of dark paint with her elbow while reaching for a brush. The black paint splashes across the previously spotless white canvas in irregular splotches. What was once a clean, unmarked surface now bears dark stains spreading in different directions. The paint continues to drip down the canvas creating more spots and marks. The artist gasps and covers her mouth in shock at the mess she created. Her art teacher rushes over with cleaning supplies but the damage is already done. how something pure and clean can be made dirty and spotted through staining