clouded vs unclear

clouded

adj
  • Unclear; surrounded in mystery. 

  • Variegated with spots. 

  • Made dim or blurry. 

  • Filled with clouds. 

unclear

adj
  • Not having a clear idea; uncertain. 

  • Not easy to see or read; indecipherable or unreadable. 

  • Ambiguous; liable to more than one interpretation. 

  • Not clearly or explicitly defined. 

verb
  • To undo the process of clearing. 

How often have the words clouded and unclear occurred in a corpus of books? (source: Google Ngram Viewer )