adj. not challenging; dull and lacking excitement; "an unglamorous job greasing engines"

adj. lacking wit or imagination; "a pedestrian movie plot"

adj. 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"

adj. producing exhaustion; "an exhausting march"; "the visit was especially wearing"

adj. flat and uninspiring