Definition
The word 'impendent' is not standard English. You probably meant 'impending,' which is commonly used. 'Impendent' is sometimes seen as an archaic or incorrect form. It's similar to 'imminent' but less frequently used. If you encounter it, it usually implies something is about to happen. It's best to stick with 'impending' or 'imminent' in modern usage. The word can sound a bit old-fashioned in most contexts.