What does the term "implacable" describe?

The term "implacable" refers to someone or something that cannot be appeased, satisfied, or pacified. In this context, it typically describes a relentless or unyielding attitude, particularly in situations involving animosity or conflict. When a person is described as implacable, it means they are resolute in their feelings or unwilling to change their stance, highlighting a sense of obstinacy or fierce determination.

While other choices might define different qualities or characteristics, they do not convey the specific and intense nature of being implacable. The correct choice effectively captures the essence of the term, emphasizing its association with unyielding hostility or dissatisfaction.