Sentence:  Held captive by society against their own free wills, the precogs are destined to foretell disturbing <WSD>precrimes</WSD>. Yet these <WSD>precrimes</WSD> will be committed by persons who are exercising their own free wills. 
Meaning of the word marked with <WSD> tags:  The act that is close to, or is a precursor of a crime.