(~s)
If you describe someone as a ~, you mean that they spend a lot of time thinking about problems that they have or unpleasant things that might happen.
N-COUNT
(~s)
If you describe someone as a ~, you mean that they spend a lot of time thinking about problems that they have or unpleasant things that might happen.
N-COUNT
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012