How to pronounce 外加 in Cantonese (2 out of 3):

外加首都華盛頓特區
Washington, D.C., the capital of the state.

Cantonese Sentence Breakdown

外加 ngoi6 gaa1
additionally
首都 sau2 dou1
capital
華盛頓特區 waa4 sing6 deon1 dak6 keoi1
Washington D.C.