watchdog

UK: ˈwɒtʃdɒɡ | US: ˈwɑːtʃdɔːɡ

Definition
  1. n. 1. A dog trained to guard property or alert its owner to intruders.

  2. n. 2. A person or group that monitors and publicizes unethical or illegal practices, especially in business or government.

Structure
watch <observe>dog <canine>
Etymology

The word "watchdog" combines "watch" (from Old English wæccan, meaning "to be awake, guard") and "dog" (from Old English docga, a common term for the domesticated canine). Historically, watchdogs were literal dogs bred or trained to guard property. By the 19th century, the term extended metaphorically to describe vigilant individuals or organizations monitoring misconduct, reflecting the dog's symbolic role as a protector.

Examples
  1. The farmer relied on his loyal watchdog to alert him of nighttime intruders.

  2. The nonprofit acts as a watchdog for corporate environmental violations.

  3. A good watchdog barks at strangers but remains calm around familiar faces.

  4. Journalists often serve as watchdogs to hold politicians accountable.

  5. The watchdog organization published a report exposing corruption in the industry.