deadening

dead·en·ing  (ddn-ng)

n.

Material used for soundproofing.

Thesaurus

Noun	1.	deadening - the act of making something futile and useless (as by routine) constipation, stultification, impairment degradation, debasement - changing to a lower state (a less respected state)
Adj.	1.	deadening - 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" boring, ho-hum, irksome, tedious, tiresome, wearisome, dull, slow uninteresting - arousing no interest or attention or curiosity or excitement; "a very uninteresting account of her trip"