noun (n)

• a scientist who devotes himself to doing research

  saintis yg mengabdikan dirinya untuk melakukan penyelidikan

  Synonym:
  research worker, researcher
  

  source: wordnet30
• someone who investigates

  seseorang yang investigates

  source: wordnet30
• a police officer who investigates crimes

  seorang pegawai polis yang investigates kejahatan

  Synonym:
  detective, police detective, tec
  

  source: wordnet30
• One who searches diligently into a subject.

  yang dengan tekun pencarian ke subjek.

  source: webster1913