Undergo eclipse is a term which refers to a celestial event wherein a celestial body moves in front of another, capitalizing the latter from being visible or affects its light. Some synonyms for the term are: eclipse, darkening, fading, shadowing, dimming, disappearing, vanishing, and obscuration. These words can be used interchangeably depending on the context of the event. Undergo eclipse is often used in astronomical discussions, but it can also be used metaphorically to describe a person or object that has lost its shine or importance. The synonyms provide different nuances and shades of meaning to convey this idea effectively.