further vs retard

further

adv
  • To a greater extent or degree. 

  • Beyond what is already stated or is already the case. 

  • Also; in addition; furthermore; moreover. 

  • Following on (from). 

  • To, at or over a greater distance in space, time or other extent. 

verb
  • To help forward; to assist. 

  • To encourage growth; to support progress or growth of something; to promote. 

adj
  • More distant; relatively distant. 

  • More, additional. 

retard

noun
  • Retardation; delay. 

  • A slowing down of the tempo; a ritardando. 

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

verb
  • To put off; to postpone. 

  • To decelerate; to slow down. 

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

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