verb (v)

• investigate scientifically(verb.communication)

  Example:
  Let's investigate the syntax of Chinese.
  

  Synonym:
  look into
  

  source: wordnet30
• conduct an inquiry or investigation of(verb.communication)

  Example:
  The district attorney's office investigated reports of possible irregularities.
  

  Synonym:
  enquire, inquire
  

  source: wordnet30
• To follow up step by step by patient inquiry or observation; to trace or track mentally; to search into; to inquire and examine into with care and accuracy; to find out by careful inquisition; as, to investigate the causes of natural phenomena.(verb)

  source: webster1913
• To pursue a course of investigation and study; to make investigation.(verb)

  source: webster1913