Wikipedia even has an article for it: http://en.wikipedia.org/wiki/Gezelligheid Example usage: Lets hope this thread will be gezellig! Yesterday was very gezellig! Drinking coffee with my friends is always so gezellig! EDIT: To add; Gezellig can also refer to things. "Your room looks gezellig!" In which context it refers to something looking cozey and sociable.
The translation is literally ‘cozy’, so it’s translatable.
This is a myth. Translaties to.”trevlig” or “mysig” in swedish.
“Convivial” in English. But admittedly less used than gezellig.