It's a society that exists under the usual, everyday visible society.
Sub means smaller or under.
its not a prefix in that word...
below
Yes, as an architectural term.It is subbase or sub-base to mean a baseboard or lowest pedestal part.
subway, substitude, substance!
The root word "sub Rosa" means "under the rose" in Latin. It is used to indicate that something is to be kept confidential or private.
"Affix sub" usually refers to adding a prefix or suffix to a word to alter its meaning or create a new word. In linguistics, it is a process of affixation where a subfix is added to a base word.
The word cell "Sub" means under.
Societies and subsections of those societies create novel jargon devices. This is done, not only for intra-communication but, as an identifying trait of those societies. These verbal labels may have positive or negative attributes which may seem arbitrary to someone external to the group. Often ordinary words are corrupted within the group and may mean something entirely different to the definition usually accepted. "Doughnut" is one such word within the sub-society you mention. You doughnut.
Assuming you mean the prefix, then it means beneath or below (also inferior to).
There were many societies at the college.
The prefix "sub-" in the word subconscious means "below" or "underneath." So, subconscious refers to thoughts or feelings existing or occurring in the mind without one's full awareness.