difficult的动词形式是什么

动词形式是make difficult，中文意思是，使困难

例如

贫困问题加剧是使我们的工作变得更加困难的一个因素。Poverty rose and that is a factor that makes our job more difficult.

这会加重感染，使治疗更加困难。This worsens the infection and makes it more difficult to treat.