person who poses a high risk
 discontented elements (e.g. of society);  dissatisfied members;  malcontents
 macromolecule;  high polymer
 discontented element;  discontented (grumbling) member
 renegade;  rebellious elements
 subversive;  subversive element
 dissident element (e.g. in a political party);  discontented element
 molecular phylogenetics;  molecular phylogeny