The word "oupa" is a term of endearment used in South Africa to refer to one's grandfather. In other parts of the world, different words are used to refer to grandfathers. In the United States, "grandpa" or "papa" are commonly used. In the United Kingdom, "granddad" or "gramps" are popular choices. In Australia, "pop" or "poppy" are commonly used. In India, "dada" or "nana" are popular ways to refer to grandfathers. Regardless of the word used, the sentiment of love and respect towards grandfathers remains the same.