wearisome
1. [ adjective ] so lacking in interest as to cause mental weariness
Synonyms: tedious boring dull tiresome irksome ho-hum slow deadening
Examples:

"a boring evening with uninteresting people" "the deadening effect of some routine tasks" "a dull play" "a ho-hum speaker" "what an irksome task the writing of long letters is"- Edmund Burke

Related terms: uninteresting
Similar spelling:   worrisome