Verb
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""deaden a sound"7. convert (metallic mercury) into a grey powder consisting of minute globules, as by shaking with chalk or fatty oil