(of talk, behaviour, work etc) causing a person to lose interest and feel tired

uninteresting

a framework of wooden or metal bars placed across an opening such as a window, used to keep out burglars or to allow air to flow through

irritating; scraping

filled with, engaged in, mischief

devilish, wicked

needing much effort

difficult; requiring hard labor

dull; uninteresting; commonplace

unimaginative

long, tiring and not interesting

dull, monotonous

annoying

irritating, exasperating

causing worry, unhappiness, difficulty

bothersome, worrisome

causing tiredness, exhaustion, impatience etc

difficult, bothersome

not enjoyable

boring, uneventful

not entertaining

boring, uneventful

not pleasant

bad

causing worry

troublesome