Oxymoron: A rhetorical figure in which incongruous or contradictory terms are combined, as in a deafening silence and a mournful optimist.

• 矛盾修饰法,一种把互相矛盾或不调和的词合在一起的修辞手法,如在震耳欲聋的沉默和悲伤的乐观。