the act of making something futile and useless (as by routine)
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"
"tedious days on the train"
"the tiresome chirping of a cricket"
"other people's dreams are dreadfully wearisome"
- Just the material costs for sound deadening alone were $1000.