adj. causing inconvenience; "they arrived at an awkward time"

adj. hard to manage; inclined to make trouble: "a difficult child"

adj. not opportune; "arrived at a most inopportune hour"; "an inopportune visit"

adj. not favored by fortune; marked or accompanied by or resulting in ill fortune; "an unfortunate turn of events"; "an unfortunate decision"; "unfortunate investments"; "an unfortunate night for all concerned"

adj. causing irritation or annoyance; "tapping an annoying rhythm on his glass with his fork"; "aircraft noise is particularly bothersome near the airport"; "found it galling to have to ask permission"; "an irritating delay"; "nettlesome paperwork"; "a pesky mosquito"; "swarms of pestering gnats"; "a plaguey newfangled safety catch"; "a teasing and persistent thought annoyed him"; "a vexatious child"; "it is vexing to have to admit you are wrong"

adj. characterized by toilsome effort to the point of exhaustion; especially physical effort; "worked their arduous way up the mining valley"; "a grueling campaign"; "hard labor"; "heavy work"; "heavy going"; "spent many laborious hours on the project"; "set a punishing pace"

adj. requiring full use of your abilities or resources; "ambitious schedule"; "performed the most challenging task without a mistake"

adj. making great mental demands; hard to comprehend or solve or believe; "a baffling problem"; "I faced the knotty problem of what to have for breakfast"; "a problematic situation at home"

adj. having concealed difficulty; "a catchy question"; "a tricky recipe to follow"

adj. difficult to handle; requiring great tact; "delicate negotiations with the big powers";"hesitates to be explicit on so ticklish a matter"; "a touchy subject"

adj. causing vexation or worry: "trying times"; "serious problems"

adj. impressively difficult; "a tall order"

adj. extremely difficult; requiring the strength of a Hercules; "a herculean task"

adj. requiring great effort; "a hard-fought primary"

adj. very unpleasant; "hellish weather"; "stop that god-awful racket"

adj. exasperatingly difficult to handle or circumvent; "a nasty problem"; "a good man to have on your side in a tight situation"

adj. full of hardship or trials; "the rocky road to success"; "they were having a rough time"

adj. causing difficulty in finding an answer or solution; much disputed; "the vexed issue of priorities"; "we live in vexed and troubled times"

adj. suited to your comfort or purpose or needs; "a convenient excuse for not going"

adj. having few parts; not complex or complicated or involved; "a simple problem"; "simple mechanisms"; "a simple design"; "a simple substance"

adj. easy and not involved or complicated; "an elementary problem in statistics"; "elementary, my dear Watson"; "a simple game"; "found an uncomplicated solution to the problem"