1.make vague or obscure or make (an image) less visible;
muffle the message
2.cut a girdle around so as to kill by interrupting the circulation of water and nutrients;
girdle the plant
3.make vapid or deprive of spirit;
deadened wine
4.lessen the momentum or velocity of;
deaden a ship's headway
5.become lifeless, less lively, intense, or active; lose life, force, or vigor
6.make less lively, intense, or vigorous; impair in vigor, force, activity, or sensation;
Terror blunted her feelings
7.convert (metallic mercury) into a grey powder consisting of minute globules, as by shaking with chalk or fatty oil