Sentence:  Often, on the plantation, he had seen the white men take drinks. But there was something somehow different in the manner of Borckman's taking a drink. Jerry was aware, vaguely, that there was something surreptitious about it. What was wrong he did not know, yet he sensed the <WSD>wrongness</WSD> and watched suspiciously. 
Meaning of the word marked with <WSD> tags:  The quality of being wrong; error or fault.