INESTIMABLE

[adjective] [formal] - extremely great; too great, or usually too good, to be described or expressed exactlyBecause the Mafia runs the world's drug-dealing businesses, its wealth is inestimable.Rain forests support half the world's species, whose medical importance is of inestimable value.The group has the inestimable advantage of being directly elected by the people.The story of how he saved inestimable treasures from destruction in the fire was often re-told.Support for the anti-war protests came from one politician who called the war an 'inestimable tragedy'.