license vs obstruct

license

verb
  • To permit (as grammatically correct). 

  • To give permission or freedom to; accept. 

  • To authorize officially. 

  • To acquire authorization to use, usually in exchange for compensation. 

  • To give formal authorization to use. 

noun
  • The legal terms under which a person is allowed to use a product, especially software. 

  • A legal document giving official permission to do something; a permit. 

  • Freedom to deviate deliberately from normally applicable rules or practices (especially in behaviour or speech). 

  • Excessive freedom; lack of due restraint. 

obstruct

verb
  • To impede, retard, or interfere with; hinder. 

  • To get in the way of so as to hide from sight. 

  • To block or fill (a passage) with obstacles or an obstacle. See synonyms at block. 

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