👉 The term "equipostile" is a term in the field of linguistics, specifically in the study of languages and their grammatical structures. It refers to a specific type of phoneme or vowel that is used only once in a word. The term was first introduced by the linguist William D. Schuyler in 1947. In English, for example, "eat" has two equipostiles: "e" and "i". This means that the sound "