raise vt.“使……上升;升起;提高”等;
rise vi.“上升;升起”;
arise vi.“站起来(stand up)”，“起床(get up)”
rise和arise用作站起，起床都属正式用法;arise主要表示“出现、发生”等意思。
She raised her voice in anger. (抬高)
The wind raised the fallen leaves from the ground. (刮起)
The child rose from the ground and ran to his mother. (=The child raised himself from the ground and ran to his mother.) (爬起)
She rises before it is light. (起床)
Difficulties will arise as we do the work. (出现)