VERB
坚持不懈；锲而不舍
If you persevere with something, you keep trying to do it and do not give up, even though it is difficult.
例句
...his ability to persevere despite obstacles and setbacks.
他锲而不舍、百折不挠的劲头儿
...a school with a reputation for persevering with difficult and disruptive children...
因对捣乱难管的学生不离不弃而闻名的学校