Here's why:
* "Adios" means goodbye in Spanish.
* "Sinora" is not a word in Spanish.
Here are some possibilities for what the person might have meant:
* "Adios señora": This means "Goodbye, madam" or "Goodbye, ma'am." This is a common and polite way to say goodbye to a woman.
* "Adios señorita": This means "Goodbye, miss" or "Goodbye, young lady." This is used when addressing a young unmarried woman.
* "Adiós señora/señorita": This is the correct spelling and pronunciation.
It's important to be respectful of the person you're addressing and use the correct terms.