SYNGEN means permafrost.
Literally, the name "SYNGEN" is a shortened version of the word "syngenetic." Syngenetic is a term used by permafrost enthusiasts (and others who desperately need more friends), to describe a very special kind of permafrost infamous for its unusually high frozen-water content and for the large deposits of clear ground ice it often contains. It is also famous for the now-extinct ice-age mammals that it sometimes preserves.
To paraquote a famous permafrost pioneer (thanks again Eb, your memory lives on):
. . . when it comes to permafrost, there's bad permafrost and then there's really bad permafrost.
When it comes to supporting a warm foundation: syngenetic permafrost is usually really bad permafrost. Over time, heat from the foundation system will thaw the frozen soils and if they contain excessive ground ice (which is usually the case with syngenetic permafrost), the resulting thaw-settlement can severely damage or even destroy a building, leaving it uninhabitable.
To cope with thaw-sensitive frozen soils, specialized foundation systems are required. Heat transfer between the building and the soil must be eliminated completely and provisions for adjustment must be incorporated into the foundation to cope with settlement occurring from naturally thawing permafrost. An example of a building with a warm foundation constructed over permafrost is shown below.
