confundir

verb
  1. To cause someone to become perplexed or unable to think clearly; to mix up or mistake one thing for another. verb
    The complex instructions served only to confundir the new employees.
    She tends to confundir the twins because they look so alike.
  2. To make something unclear or indistinct; to blur or obscure. verb
    The fog began to confundir the outlines of the buildings.
    The artist used colors that seemed to confundir the boundaries between shapes.