1. (

• boring ,
• deadening ,
• dull ,
• ho-hum ,
• irksome ,
• slow ,
• tedious ,
• tiresome ,
• wearisome

) 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" ;