adj. having a debilitating effect; "an exhausting job in the hot sun"

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

adj. requiring precise accuracy; "an exacting job"; "became more exigent over his pronunciation"

adj. not forbearing; ruthless; "an unsparing critic"

adj. not easily borne; wearing; "the burdensome task of preparing the income tax return"; "my duties weren't onerous; I only had to greet the guests"; "a taxing schedule"

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

adj. causing debilitation

adj. resulting in punishment; "the king imposed a punishing tax"

adj. requiring much effort and trouble; "the mountain climb was long, steep, and difficult"

adj. requiring or showing effort; "heavy breathing"; "the subject made for labored reading"

adj. (of movement) slow and laborious; "leaden steps"

adj. imparting strength and vitality; "the invigorating mountain air"