dead-end vs throw a monkey wrench into

dead-end

verb

  • To come to a dead-end. 

noun

  • A road with no exit. 

  • A position that offers no hope of progress. 

adj

  • Going nowhere; blocked. 

throw a monkey wrench into

How often have the words dead-end and throw a monkey wrench into occurred in a corpus of books? (source: Google Ngram Viewer )