USAID is the United States Agency for International Development, a government agency that administers civilian foreign aid and development assistance. In common usage, it refers to the agency itself as a proper noun. The pronunciation is typically treated as an initialism rather than a spoken word, often sounded out letter-by-letter. In high-formality contexts, you may also hear it as "U-S-A-I-D" rather than a single phonetic unit.
Full pronunciation guide
