shadowy

adj

1. In shadow; darkened by shadows.

   “He sat in a shadowy corner.”

2. Dark, obscure.

   “He was a shadowy man who rarely spoke.”

   “But the most frequent guests were as New York magazine put it, “Arab princes, Third World officials, and shadowy European and American businessmen.”

3. (figuratively)Vague, dim, unclear, faint.
4. (dated, rare)Indulging in fancies; daydreaming.