favouritism

1. N-UNCOUNT If you accuse someone of favouritism, you disapprove of them because they unfairly help or favour one person or group much more than another. 偏袒[表不滿]

Maria loved both the children. There was never a hint of favouritism. 這兩個孩子瑪麗亞都愛，從未有過一絲偏袒。