Sentence:  “But they cover the legs,” Joseph explained. “That is the only reason my people wear <WSD>pants</WSD>: to cover the legs in the winter, or when traveling through rough country, full of thorns. In warm weather, or in open country, <WSD>pants</WSD> are unnecessary, uncomfortable, and foolish.” 
Meaning of the word marked with <WSD> tags:  An outer garment that covers the body from the waist downwards, covering each leg separately, usually as far as the ankles; trousers. (from 19th c.)