Synonym: conundrum, enigma, issue, mystery, perplexity, puzzle, question. Antonym: solution. Similar words: probably, robot, oblivious, obligation, lemon, element, dilemma, implement. Meaning: ['prɑbləm /'prɒ-] 
n. 1. a state of difficulty that needs to be resolved 2. a source of difficulty 3. a question raised for consideration or solution.
n. 1. a state of difficulty that needs to be resolved 2. a source of difficulty 3. a question raised for consideration or solution. 
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151 The first inkling we had of Cliff's problem was when he didn't come to work.
152 His plan does not offer a real solution to the problem.
153 A competent mechanic should be able to fix the problem.
154 The problem has come to the fore again in recent months.
155 I'm sorry to barge in like this, but I have a problem I hope you can solve.
156 She was not at all daunted by the size of the problem.
157 We must solve this problem by argument not by fighting.
158 It soon became apparent that we had a major problem.
159 There are several different ways we can tackle this problem.
160 Engineers are endeavouring to locate the source of the problem.
161 He was convinced that I was part of the problem.
162 Offering advice on each and every problem will undermine her feeling of being adult.
163 The problem with white is that it soon shows the dirt.
164 They finally awoke to the full extent of the problem.
165 It can't be denied that we need to devote more resources to this problem.
166 We should explore/pursue every avenue in the search for an answer to this problem.
167 You are not approaching the problem in the correct manner.
168 Life is a test and this world a place of trial. Always the problems - or it may be the same problem will be presented to every generation in different forms.
169 She dismantled the washing machine to see what the problem was,(www.Sentencedict.com) but couldn't put it back together again.
170 A problem for manufacturers is that lighter cars tend to be noisy.
171 He continued to ponder the problem as he walked home.
172 The committee has little or no understanding of the problem.
173 His main problem was the extremely smoky atmosphere at work.
174 In the unlikely event of a problem arising, please contact the hotel manager.
175 Are there any suggestions about how best to tackle the problem?
176 Details of the problem will be logged by the Help Desk staff who will then contact the appropriate agency.
177 The safe disposal of nuclear waste is a major problem.
178 Now that the problem has been identified, appropriate action can be taken.
179 We have to tackle the fundamental cause of the problem.
180 A panel of experts gave its opinion on ways to solve the traffic problem.
More similar words: probably, robot, oblivious, obligation, lemon, element, dilemma, implement, settlement, elementary, finite element, implementation, pro, able, table, cable, bless, blend, Bible, bubble, enable, unable, marble, double, foible, prompt, be able to, visible, voluble, stumble.