Something that is difficult is not easy to do, understand, or deal with.
challenging , complex , demanding , hard
easy , simple , straightforward , undemanding , uncomplicated
The lack of childcare provision made it difficult for single mothers to get jobs.
儿童保育服务的缺乏使得单身妈妈们很难找到工作。
It was a very difficult decision to make.
这是个非常难作的决定。
Someone who is difficult behaves in an unreasonable and unhelpful way.
I had a feeling you were going to be difficult about this.
我有种感觉,在这件事情上你将很难对付。