Sentence:  [The slave] toils that another may reap the fruit; he is industrious that another may live in idleness; he eats <WSD>unbolted</WSD> meal that another may eat the bread of fine flour; he labors in chains at home, under a burning sun and biting lash, that another may ride in ease and splendor abroad ... 
Meaning of the word marked with <WSD> tags:  Not sifted.