guard dog

• Cão treinado ou mantido para proteger propriedades, pessoas ou animais contra intrusos ou perigos.

A dog trained or kept to protect property, people, or animals from intruders or danger.

1. Protective animalA2formal

   A dog trained to protect property or people from intruders or danger.

   Cão de guarda

   • They keep a guard dog in their yard to deter burglars.
   • The guard dog barked loudly when a stranger approached the gate.
   • A well-trained guard dog can be a valuable asset for security.

2. Vigilant personB2informal

   A person who is extremely watchful or protective, often in a metaphorical sense.

   Cão de guarda (sentido figurado)

   • The editor acted as a guard dog for the company's reputation.
   • She is a guard dog when it comes to her children's safety.
   • The lawyer was a guard dog for the client's interests during the negotiation.