What are the antonyms for Re-liefest?

• adj.

  • secondary
  • big
  ,
  • causative
  ,
  • chief
  ,
  • consequential
  ,
  • first-class
  ,
  • first-rate
  ,
  • huge
  ,
  • important
  ,
  • large
  ,
  • main
  ,
  • major
  ,
  • necessary
  ,
  • primary
  ,
  • significant
  ,
  • source
  ,
  • superior
  ,
  • useful
  ,
  • valuable
  ,
  • worthwhile
  .

Well up on is typically used to describe someone who possesses a great amount of knowledge or expertise on a particular subject. However, there are several antonyms for this phrase...