Learn how to say Cooptation correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word co-opt:
to add (a person or persons) to a group by vote of those already members
to appoint as an associate
to persuade or lure (an opponent) to join one’s own system, party, etc.
to make use of for one’s own purposes; take over or adopt
(Also ) ˈco-öpt