Antonym: ease, simplicity. Similar words: difficult, multicultural, faculty, diffident, diffidence, diffidently, agriculture, horticulture. Meaning: ['dɪfɪkʌltɪ /kltɪ] 
n. 1. an effort that is inconvenient 2. a factor causing trouble in achieving a positive result or tending to produce a negative result 3. a condition or state of affairs almost beyond one's ability to deal with and requiring great effort to bear or overcome 4. the quality of being difficult.
n. 1. an effort that is inconvenient 2. a factor causing trouble in achieving a positive result or tending to produce a negative result 3. a condition or state of affairs almost beyond one's ability to deal with and requiring great effort to bear or overcome 4. the quality of being difficult. 
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271) The difficulty was resolved by Fresnel with his addition of the concept of interference.
272) The safe of RSA algorithm based on difficulty in the factorization.
273) The rapid flow flood tide makes the construction very difficulty, leading to the breaking of piles.
274) With my wife and children I found with great difficulty a room in the Kiev Hostelry.
275) Something you do effortlessly might pose a great difficulty for a handicapped person.
276) For the expropriated farmers, re - employment difficulty directly leads to a series of life difficulty.
277) They had little difficulty in finding it. but hauling it out of the water proved to be a serious problem.
278) Complex tone fingering break the traditional common rules[sentencedict.com], then increase the difficulty of play.
279) The measuring verification of handle automobile engine tachometer is always difficulty area of automobile measurement.
280) For example, a person who has difficulty reading may dyslexia.
281) Another difficulty encountered in large enterprises is the hoarding of promotable persons by their immediate superiors.
282) The project was a bold one , full of difficulty, perhaps impracticable.
283) We have to go a long way to overcome the difficulty?
284) Feature extraction is the difficulty of handwritten chinese character recognition.
285) You may encounter difficulty figuring out where your own solution of a homework problem went astray.
286) They had difficulty grasping the relationship between their Income Statement and their Balance Sheet.
287) This will go a long way to overcome the difficulty.
288) In addition, the ultra high roller wire also increases the difficulty of cleaning roller.
More similar words: difficult, multicultural, faculty, diffident, diffidence, diffidently, agriculture, horticulture, agricultural, diffuse, differ, faulty, diffract, different, differ from, difference, indifferent, beg to differ, diffraction, sniffing, indifference, agree to differ, differentiate, edifice, reticule, ridicule, office, make a difference, differentiation, cult.