mordant >> /ˈmɔrdnt/
Definition: [transitive verb] Impregnate or treat (a fabric) with a mordant.
Example: mordanting a fiber is simple
Definition: [noun] A substance, typically an inorganic oxide, that combines with a dye or stain and thereby fixes it in a material.
Example: In order to get the color to stick well on the fiber, the wool was usually pretreated with a metal compound called a mordant; common mordants, still used in craft dying, are compounds of aluminum, iron, copper, tin, and chromium.
Definition: [adjective] (especially of humor) having or showing a sharp or critical quality; biting.
Example: a mordant sense of humor