Shadowy (adjective)

1. Partly or completely dark; lacking light.
2. Vague, indistinct, or lacking detail.

Origin:

From the word 'shadow' which means an area where light is obstructed.

Examples:

1. She sat in a shadowy corner, away from the bright lights.
2. The shadowy figure moved quietly in the night.
3. The details of the deal were shrouded in a shadowy cloud of secrecy.
4. The mountain range disappeared in the distance in a shadowy haze.
5. A shadowy image appeared on the wall.