difficult
a.
1.(指任务)需要精力或技术的;困难的[+to-v]
It's very difficult to swim across the Yangtze River.
游过长江很难.
Mathematics is difficult for some students.
有些学生觉得数学困难.
2.难相处的,不随和的
Mary was a very difficult child.
玛丽过去是一个很难弄的孩子.
3.艰难的,难熬的
The most difficult days are over.
最困难的日子已经过去了