To spoil the appearance of.
To tarnish (reputation, character, etc.); to defame.
A moral defect; a character flaw.
A small flaw which spoils the appearance of something, a stain, a spot.
To lose its lustre or attraction; to become dull.
To compromise, damage, soil, or sully.
To oxidize or discolor due to oxidation.
Oxidation or discoloration, especially of a decorative metal exposed to air.