maybe

The word "maybe" is a classic example of univerbation, the process by which a frequently used phrase solidifies into a single lexical unit. It originated in Middle English as the phrase "it may be," expressing possibility or uncertainty. Over centuries of common usage, the three-word phrase was phonetically reduced and fused into the compound adverb "maybe" by the late 16th century. This evolution demonstrates how syntactic constructions can grammaticalize into fixed, indivisible words, with the original literal meaning of "it is possible that" preserved in its modern function as a modal adverb expressing possibility.

The word is a lexicalized fusion of the phrase "it may be".