watchdog

 
Pronunciation: /ˈwɒtʃdɒg/

noun

  • a dog kept to guard private property.
  • a person or group that monitors the practices of companies providing a particular service or utility: the consumer watchdog for transport in London

verb (watchdogs, watchdogging, watchdogged)

[with object]
  • monitor (a person, activity, or situation): how can we watchdog our investments?