Will POSSIBLY' is an expression used to indicate that something is likely to happen, but not certain. It is often used to express uncertainty or to suggest that the outcome of a situation is uncertain. The term 'WILL POSSIBLY' is derived from the verb 'WILL' which is used to express future tense, and the adverb 'POSSIBLY' which is used to express uncertainty. Therefore, when combined, the phrase 'WILL POSSIBLY' expresses a degree of uncertainty about the future.