投影

1. Origins, structure, and basic meaning

• Structure: 投影 (とうえい) means projecting an image or figuratively projecting emotion onto something else.
• Basic usage: A source image is physically projected on a wall; a protagonist's anxiety is figuratively projected onto a dark landscape.

2. Common pitfalls and similar expressions

• Image cast on a wall and emotion reflected in scenery
  • The active object is 画像を; the passive subject is 不安が. The latter does not describe light from a projector.