Be-twixt is an old English word that means "between". There are several synonyms for the word "be-twixt" that you can use to express the same meaning. Some of these synonyms include "in-between", "midway", "intermediary", "amidst", and "amongst". "In-between" is the most commonly used synonym for "be-twixt" in modern English. It is often used to describe something that is situated between two points or things. "Midway" is another synonym that can be used to describe something that is located in the middle. "Intermediary" is a more formal synonym that is used to describe something that connects two things. Other synonyms for "be-twixt" include "amidst" and "amongst", which are both used to describe something that is located in the midst of a group.