👉 A sesquiseptimal is a term in linguistics and psychology that refers to an aspect of language that is characterized by its complexity, ambiguity, and difficulty for human listeners. This term arises from the idea that the concept of "separation" or "secession" may be difficult for humans to grasp due to their limited linguistic knowledge. In general, a sesquiseptimal structure in a sentence means that the speaker's understanding is incomplete or unclear about what was said, and it