Klexos

The Dictionary of Obscure Sorrows is a website and YouTube series that invents and defines words. Each of these words "aims to fill a hole in the language". John Koenig, the inventor of these words, says on his website ( www.dictionaryofobscuresorrows.com ) that these words "give a name to emotions we all might experience but don't yet have a word for". This particular video is the word "Klexos": the art of dwelling on the past.