What is the origin of the idiom "betwixt and between" and when to use it?

The idiom "betwixt and between" originates from Middle English and has been used in English literature since the 14th century. It is considered an idiomatic expression that conveys the idea of being in an intermediate or undecided state, neither fully in one condition nor in another. The phrase is commonly used to describe situations of ambiguity, indecision, or being caught between two options. It is commonly employed in conversations, writing, and literature to express a state of uncertainty or being in an intermediate position.