(adj): requiring full use of your abilities or resources
(adj): difficult to accomplish; demanding considerable mental effort and skill
(adj): hard to deal with; especially causing pain or embarrassment
(adj): making great mental demands; hard to comprehend or solve or believe
(adj): having concealed difficulty
(adj): difficult to handle; requiring great tact
(adj): unpredictably difficult in operation; likely to be troublesome
(adj): requiring great effort
(adj): extremely difficult; requiring the strength of a Hercules
(adj): exasperatingly difficult to handle or circumvent
(adj): full of hardship or trials
(adj): very difficult; severely testing stamina or resolution
(adj): requiring effort or concentration; complex and not easy to answer or solve
(adj): prenominal) -- (impressively difficult
(adj): bristling with perplexities
(adj): difficult to deal with
(adj): hard to endure
(adj): causing difficulty in finding an answer or solution; much disputed
(adj): vs. soft) -- (dispassionate
(adj): used of persons
(adj): used of persons; emotionally hardened
(adj): resembling steel as in hardness
(adj): vs. soft) -- (resisting weight or pressure
(adj): having the hardness of a diamond
(adj): of pasta cooked so as to be firm when eaten
(adj): made of horn (or of a substance resembling horn)
(adj): of sexual organs; stiff and rigid
(adj): not soft or yielding to pressure
(adj): hard as granite
(adj): converted to solid form (as concrete)
(adj): made hard like wood as the result of the deposition of lignin in the cell walls
(adj): (of bone especially the temporal bone) resembling stone in hardness
(adj): somewhat hard
(adj): resembling steel in hardness
(adj): resistant to physical force or pressure
(adj): very strong or vigorous
(adj): vs. weak) -- (having strength or power greater than average or expected
(adj): characterized by effort to the point of exhaustion; especially physical effort
(adj): vs. effortless) -- (requiring great physical effort
(adj): vs. voiced), voiceless, surd, hard -- (produced without vibration of the vocal cords
(adj): spoken in soft hushed tones without vibrations of the vocal cords
(adj): vs. soft), concentrated -- ((of light) transmitted directly from a pointed light source
(adj): vs. soft) -- ((of speech sounds); produced with the back of the tongue raised toward or touching the velum
(adj): produced with the back of the tongue touching or near the soft palate (as `k' in `cat' and `g' in `gun' and `ng' in `sing')
(adj): given to excessive indulgence of bodily appetites especially for intoxicating liquors
(adj): vs. nonindulgent) -- (characterized by or given to yielding to the wishes of someone
(adj): being distilled rather than fermented; having a high alcoholic content
(adj): vs. nonalcoholic) -- (characteristic of or containing alcohol
(adj): unfortunate or hard to bear
(adj): vs. good) -- (having undesirable or negative qualities
(adj): dried out
(adj): vs. fresh) -- (lacking freshness, palatability, or showing deterioration from age
(adv): with effort or force or vigor
(adv): with firmness
(adv): earnestly or intently
(adv): causing great damage or hardship
(adv): slowly and with difficulty
(adv): indulging excessively
(adv): into a solid condition
(adv): very near or close in space or time
(adv): with pain or distress or bitterness
(adv): to the full extent possible; all the way
