Pie is a countable noun, not an uncountable noun, and its plural form is formed by adding S directly after the singular form, that is, pies. It can be used to refer to cakes with various fillings, such as pies, meat pies or vegetable pies. Pie is an English word that can be used as both a noun and a verb. "English words" refer to words based on English, including not only literal translation, but also the connotation, context and cultural background of words. English words are language units used to express specific meanings, and letter combinations spelled to express a concept, thing or behavior are widely used in English. At the same time, "English words" can also refer to English, Britain or British people.