dutch word has no literally translation to English. Dutch use it a lot, everything is gezellig
gezelligheid is the modern day religion of the Dutch. They love it, they need it and they respect it.
Gezellig and gezelligheid are less about a word and more about a feeling.
Dutch people tend to evaluate everything on its particular level of gezelligheid. A place can be gezellig, a room can be gezellig, a person can be gezellig, an evening can be gezellig. Even childbirth can be rated by it’s gezellig-ness
i think it’s impossible to explain unless you’ve grown up with it but the link to “shit Dutch people like” is pretty accurate