Answer:
The word "sable" transfers a tone of inferiority. This inferiority was imposed, by the whites, to the blacks who were brought from Africa to America.
Step-by-step explanation:
The word "sable" refers to something dark, black, bad, filthy, and somber. When the author used that word, he wanted to emphasize how blacks were viewed by whites and convey a tone of inferiority and repulsion so that the reader would feel how blacks were considered.