The meaning of "forbidding" in the sentence is A) grim and unfriendly. In this context, it describes a countenance that is harsh, stern, and unapproachable, suggesting an unfriendly and disagreeable demeanor. The use of "forbidding" emphasizes the negative and unwelcoming appearance of the person being described.
In the given sentence, the term "forbidding" conveys an aura of grimness and unfriendliness. The use of "forbidding" to describe the countenance of the individual suggests a demeanor that is harsh, stern, and unwelcoming.
The person is characterized as being above his company and not easily pleased, projecting an air of superiority and disdain. This adjective serves to emphasize the negative and disagreeable nature of the person's expression, creating an image of someone unapproachable and likely to repel others.
The choice of "forbidding" paints a vivid picture of the individual's demeanor, contributing to the overall characterization and setting a tone of hostility or aloofness associated with the person being described.