The standard British pronunciation is with the stress on the first syllable [add-vuh-sree]. The US pronunciation also has the stress on the first syllable, but both rs are pronounced, and the end is pronounced [serry] to rhyme with sherry.
Black stands for the African people. White symbolizes peace. Black, red, and green, the ‘black liberation’ colours, denote Africa's rebirth. Red represents the blood common to all people. Green recalls the fertile land. Effective date: 12 December 1963.