Sentence:  In 1825 , the Boston house carpenters ' strike for a ten-hour day was denounced by the organized employers , who declared : `` It is considered that all combinations by any classes of citizens intended to effect the value of labor tend to <WSD>convert</WSD> all its branches into monopolies '' . 
Meaning of the word marked with <WSD> tags:  change from one system to another or to a new plan or policy