godan verb (-su), transitive verb
project; reflect; cast (shadow)
Used for projecting an image onto a surface, reflecting in a mirror or water, or casting a shadow. The object is the thing being shown, and the surface is marked with に.
壁にスライドを映す。
Project a slide onto the wall.
湖が山を映している。
The lake is reflecting the mountains.
木が地面に長い影を映している。
The tree is casting a long shadow on the ground.