WORRY

[noun]Fortunately, at the moment, we don't really have any financial worries. [C]Keeping warm in the winter is a major worry for many old people. [C]Unemployment, bad health - all sorts of things can be a cause of worry. [U]Do you really not have any worries about what might happen in the future? [C]But there was a nagging worry in his mind that if he'd acted sooner the problem would not have arisen. [C]