Definition
To an absolute and thorough degree; completely and fully.
完全地
After this renovation, the house is good and proper refreshed.
经过这次翻新，房子彻底地焕然一新了。
He fixed the old car good and proper, and it runs smoothly now.
他把这辆旧车彻底修好了，现在它跑得很顺畅。
Only after ensuring all the details are in order can we say that the project is good and proper finished.
只有确保所有细节都处理好后，我们才能说这个项目彻底完成了。