The word "濒于" is formed by combining the character "濒", which means "to be close to" or "on the verge of", with the character "于", a preposition that indicates direction or location. In this compound, "濒" provides the core meaning of proximity to a state, while "于" grammatically links to what follows, typically a noun or phrase describing that state, resulting in a phrase that expresses being on the point of something.