Damaged
Part of speech: verb
Definition: To impair the soundness, goodness, or value of; to harm or cause destruction.
Example sentence: I watched Titanic when I got back home from the hospital, and cried. I knew that my IQ had been damaged.
Tarnished
Part of speech: verb
Definition: To oxidize or discolor due to oxidation.
Example sentence: It is unfortunate that the poor judgment shown by a small group of young actors has tarnished the reputation of every child who has ever appeared before a camera.