blocked vs impassable

blocked

adj
  • Unable to move owing to an obstruction. 

  • Obstructed, so that through movement or flow is prevented or impeded. 

  • Disabled or disconnected, so as to prevent access. 

  • Banned or barred from connecting or logging on. 

  • Drunk 

impassable

adj
  • Incapable of being overcome or surmounted. 

  • Not usable as legal tender. 

  • Incapable of being passed over, crossed, or negotiated. 

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