co-opt 
(k
ō-
ŏpt
, k
ōŏpt
′)
tr.v. co-opt·ed,
co-opt·ing,
co-opts 1. To elect as a fellow member of a group.
2. To appoint summarily.
3. To take or assume for one's own use; appropriate: co-opted the criticism by embracing it.
4. To neutralize or win over (an independent minority, for example) through assimilation into an established group or culture: co-opt rebels by giving them positions of authority.
[Latin cooptāre : co-, co- + optāre, to choose.]
co′-op·tation n.
co-opta·tive (-tə-tĭv) adj.
co-option n.
co-optive adj.