feckless vs unfun

feckless

adj
  • Lacking purpose. 

  • Without skill, ineffective, incompetent. 

  • Lacking the courage to act in any meaningful way. 

unfun

adj
  • Not fun. 

noun
  • Lack or absence of fun; funlessness. 

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