abstractive vs unclear

abstractive

adj
  • Having an abstracting nature or tendency; tending to separate; tending to be withdrawn. 

  • Derived by abstraction; belonging to abstraction. 

unclear

adj
  • Ambiguous; liable to more than one interpretation. 

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

  • Not having a clear idea; uncertain. 

  • Not clearly or explicitly defined. 

verb
  • To undo the process of clearing. 

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