Question

He was a short thick set man with ___ commonplace features and swaggering

Answer 1

he was a short thick set man with “their"commonplace-----------------.

Answer 2

This line has been extracted from the book Uncle Tom's Cabin. It was crafted by Harriet Beecher Stowe. To be more specific, this line is taken from the Volume-I's chapter 1 (page one) of the book. This is the description provided by the author about one of the individuals sitting and talking in the introductory scene of the plot.

Anyhow, the word that is perfect to be fitted here is: "coarse."

This word elaborates the outer look of the character. Moreover, now, the complete sentence with the required expression would be:

"He was a short thick-set man, with coarse, commonplace features and swaggering..."