Sentence:  The <WSD>sellsword</WSD> scrambled backward, checking each blow, stepping lithely over rock and root, his eyes never leaving his foe. He was quicker, Catelyn saw; the knight's silvered sword never came near to touching him, but his own ugly grey blade hacked a notch from Ser Vadis's shoulder plate. 
Meaning of the word marked with <WSD> tags:  A mercenary.