oligopolize

Verb

 * 1)  To convert a market into an oligopoly.
 * 2) * 2006, Japan Environemntal Council (JEC), The State of Environment in Asia: 2005/2006, Springer Science & Business Media (ISBN 9784431274032), page 47:
 * Japanese trading companies and large seafood companies responded with attempts to monopolize or oligopolize import and sales routes.
 * Japanese trading companies and large seafood companies responded with attempts to monopolize or oligopolize import and sales routes.