👉 "Fifteenthly" is a phrase used in formal or academic contexts to indicate that something has not yet been done, completed, or achieved. It can also be used informally to mean "finally" or "at last." For example: - In an academic setting, the term might be used when discussing a key point or concept that has yet to be fully understood or established. - In a more informal context, it could refer to something that has been done but not yet completed.