If something deadens a feeling or a sound, it makes it less strong or loud. He needs morphine to deaden the pain in his chest. to make a feeling or sound less strong
convert (metallic mercury) into a grey powder consisting of minute globules, as by shaking with chalk or fatty oil make less lively, intense, or vigorous; impair in vigor, force, activity, or sensation; "Terror blunted her feelings"; "deaden a sound"
{f} diminish, alleviate; anesthetize, numb; make less lively; become dead; kill; make soundproof; make vapid, deprive of alcohol (such as wine)
To make as dead; to impair in vigor, force, activity, or sensation; to lessen the force or acuteness of; to blunt; as, to deaden the natural powers or feelings; to deaden a sound
devoid of physical sensation; numb; "his gums were dead from the novocain"; "she felt no discomfort as the dentist drilled her deadened tooth"; "a public desensitized by continuous television coverage of atrocities"
so lacking in interest as to cause mental weariness; "a boring evening with uninteresting people"; "the deadening effect of some routine tasks"; "a dull play"; "his competent but dull performance"; "a ho-hum speaker who couldn't capture their attention"; "what an irksome task the writing of long letters is"- Edmund Burke; "tedious days on the train"; "the tiresome chirping of a cricket"- Mark Twain; "other people's dreams are dreadfully wearisome"