entangle vs sever

entangle

verb
  • To involve in such complications as to render extrication difficult. 

  • To ensnare. 

  • To tangle up; to twist or interweave in such a manner as not to be easily separated. 

  • To involve in difficulties or embarrassments; to embarrass, puzzle, or distract by adverse or perplexing circumstances, interests, demands, etc.; to hamper; to bewilder. 

sever

verb
  • To suffer disjunction; to be parted or separated. 

  • To disconnect; to disunite; to terminate. 

  • To make a separation or distinction; to distinguish. 

  • To cut free. 

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