oscuro
dark
obscure
dark, unclear
Oscuro means dark and is closely related to the English word obscure0, which also means dark or unclear0.
adjective
  1. dark
    Dark or lacking light
    El cielo estaba oscuro y amenazante. // The sky was dark and threatening.
  2. obscure
    Difficult to understand or mysterious
    El significado de la película era bastante oscuro. // The meaning of the movie was quite obscure.