SPIFFS (UP) is an acronym that stands for 'Small, Portable, Inexpensive, File System'. It is a type of file system used in embedded systems, such as those found in consumer electronics. JAZZES (6 letters) is a verb meaning to make something more lively or exciting. NEATENS (7 letters) is a verb meaning to make something orderly and tidy. Together, these solutions suggest that SPIFFS (UP) is a file system that can be used to make embedded systems more lively and orderly.