A delightful neologistic oddity! :)

'“The Dictionary of Obscure Sorrows”, by John Koenig, is an ongoing collection of invented words, each representing an attempt to find a word to fit a concept for which our vocabulary is currently lacking. Vellichor is one such word, and Koenig’s site has hundreds of others, such as zenosyne (the sense that time keeps going faster), liberosis (the desire to care less about things), and sonder (the realization that each random passerby is living a life as vivid and complex as your own).'
- Petrichor, Cromulent, and Other Words the Internet Loves. Retrieved from https://www.merriam-webster.com/words-at-play/internets-favorite-words