a source of difficulty; "one trouble after another delayed the job"; "what's the problem?"困難のもと面倒
a question raised for consideration or solution; "our homework consisted of ten problems to solve"考慮または解決するために提起される疑問題
a state of difficulty that needs to be resolved; "she and her husband are having problems"; "it is always a job to contact him"; "urban problems such as traffic congestion and smog"解決する必要のある困難な状況骨の折れること