self-discipline不是形容词，是名词
例句
1、
Are you sure that you have the self discipline necessary to work from home?
你是否确定你有回家工作的自律性
2、
The basis of abiding by law lies in a kind of self discipline.
广大人民遵守法律的落脚点在于一种道德自律。
3、
When it comes to building wealth， having knowledge is important but self discipline is even more important.
说到积累财富，知识固然重要，但更缺不了自律。
