(~s)
You refer to someone as a ~ if they help you when you are in difficulty.
A good ~ offered us a room in his house.
N-COUNT
(~s)
You refer to someone as a ~ if they help you when you are in difficulty.
A good ~ offered us a room in his house.
N-COUNT
Collins COBUILD. Толковый словарь английского языка для изучающих язык Коллинз COBUILD (международная база данных языков Бирмингемского университета) . 2012