ภาษาอังกฤษวันละคำ : nagging

The adjective nagging refers to something that affects you in an unpleasant way for a long time and is difficult to get rid of. ...

• President Obama referred to a “nagging fear that America's decline is inevitable and that the next generation must lower its sights”.
• It would have been quite easy for Terry to have pulled out of the match too, as it is known he has been carrying a nagging injury.
• "There has been a nagging sense of uncertainty in the last couple years, of whether anyone is really afraid of Israel anymore," he said.
• The US Defence Department has ended for now a $35 billion transatlantic aerial-refuelling competition, handing a nagging seven-year headache to the next administration and boosting Boeing Co's hopes to keep Airbus planes out of the Air Force fleet. ...

(From Bangkok Post)