expert
noun OPAL WOPAL S
  /ˈekspɜːt/
  /ˈekspɜːrt/
- a person with special knowledge, skill or training in something
- a legal/security/medical/computer expert
 - Police consulted their own team of forensic experts.
 - according to an expert According to our panel of leading industry experts, a downturn is inevitable.
 - Experts believe/predict/say…
 - expert in something Experts in the field of child psychology warn of the dangers of social media.
 - expert on something I don't pretend to be an expert on the subject .
 - expert at something Nobody can be an expert at everything.
 - expert in doing something You will need to become an expert in analysing data.
 - expert on doing something an expert on managing change in the workplace
 - expert at doing something He's an expert at getting his own way.
 - Don't ask me—I'm no expert!
 
Extra Examples- A panel of experts will answer questions from the television audience.
 - Experts agree that a balanced diet is the key to great health.
 - She is a world expert on butterflies.
 - Medical experts are predicting a massive rise in obesity-related illnesses.
 - Weapons experts were sent to try to uncover evidence of a nuclear programme.
 - I'm no expert, but I think you should get that cut seen to.
 - The so-called experts seem to have no explanation for this.
 - The article quoted climate experts as saying that we should expect more extreme weather events.
 
Oxford Collocations Dictionaryadjective- real
 - leading
 - acknowledged
 - …
 
- committee
 - panel
 - team
 - …
 
- ask
 - consult
 - talk to
 - …
 
- advise somebody/something
 - agree something
 - argue something
 - …
 
- expert at
 - expert in
 - expert on
 - …
 
Word OriginMiddle English (as an adjective): from French, from Latin expertus, past participle of experiri ‘try’. The noun use dates from the early 19th cent. Compare with experience and experiment.