How do you say shadow in sign language?

There isn't a single sign for "shadow" in American Sign Language (ASL). Instead, you would use a sign that describes the concept of a shadow. Here are a few options:

1. "Dark" + "Follow": This is a common way to describe a shadow. You sign "dark" (a simple sign made with the dominant hand moving downward in front of the chest) followed by "follow" (which is a sign made with the dominant hand moving alongside the non-dominant hand, which is held stationary).

2. "Shape" + "Ground": This option focuses on the shape of the shadow. Sign "shape" (a sign with the dominant hand making a circle and then spreading out, like molding something) and then "ground" (a sign where you touch the floor with your dominant hand).

3. "Light" + "Block": This option emphasizes the absence of light that creates a shadow. Sign "light" (a sign with the dominant hand moving upward from the chest like a light shining) and then "block" (a sign with the dominant hand forming a flat shape and blocking something).

4. "Image" + "Reflect": This option describes the shadow as a reflection of the object. Sign "image" (a sign with the dominant hand mimicking taking a picture) and then "reflect" (a sign with the dominant hand moving out and back, like a mirror reflection).

The best sign to use will depend on the context of the conversation. Always look for the most natural and clear way to communicate your meaning.