hamstring vs retard

hamstring

verb
  • To cripple; to incapacitate; to disable. 

  • To lame or disable by cutting the tendons of the ham or knee; to hough. 

noun
  • One of the great tendons situated in each side of the ham, or space back of the knee, and connected with the muscles of the back of the thigh. 

  • The biceps femoris, semimembranosus, and semitendinosus muscles. 

retard

verb
  • To decelerate; to slow down. 

  • To put off; to postpone. 

  • To keep delaying; to continue to hinder; to prevent from progressing. 

noun
  • Retardation; delay. 

  • A slowing down of the tempo; a ritardando. 

  • A person or being who is extremely stupid or slow to learn. 

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