Sentence:  Words like these, I observed, always troubled them; and I had no small satisfaction in <WSD>wringing</WSD> from the boys, occasionally, that fresh and bitter condemnation of slavery, that springs from nature, unseared and unperverted. 
Meaning of the word marked with <WSD> tags:  To draw (something "from" or "out of" someone); to generate (something) as a response.