The spelling of the word "suppa" may seem unusual, but it can be explained using the International Phonetic Alphabet (IPA). The first two letters, "su," are pronounced as in "sue" /suː/. The double "p" indicates that the "p" sound should be pronounced with a slight emphasis, almost as if there were an extra "p" in the word. Finally, the "a" is pronounced as the short "a" in "cat" /æ/. Together, these sounds create the unique spelling and pronunciation of "suppa."
The word "suppa" is of Italian origin and is derived from the Italian word "zuppa". "Zuppa" originated from the Latin word "suppa", meaning "sopped bread" or "broth-soaked bread". It eventually evolved into "suppa" in Italian, which broadly refers to any kind of soup or broth-based dish.