Oaxaca is a State in Mexico. It is officially known as Free and Sovereign State of Oaxaca (Estado Libre y Soberano de Oaxaca). It's capital and largest city is Oaxaca de Juárez.
The name Oaxaca derives from the Aztec word Huaxyacac and refers to the "guaje" tree found in Oaxaca de Juárez.
Oaxaca is now pronounced by most of its population in Spanish rather than pronouncing it in the Aztec language, Nahuatl.
The correct pronunciation of Oaxaca is wah-HAH-kah.
The stress in Oaxaca is pronounced on the second syllable.
The "oa" combination at the beginning of Oaxaca is pronounced as "wah".
The "x" is then pronounced as if it were an "h" in this case. The pronunciation of the following "a" is then like a short "a", which means it is pronounced with an "ah" sound.
In the last syllable, the "c" is pronounced like a "k" and it is then followed by another "a" that is pronounced as "ah".