It means under.
The prefix "sup" in "supportive" comes from the Latin word "sub," which means "under" or "below." So, in this context, "sup" signifies providing assistance or backing from underneath or through reinforcement.
Sup- and sub- are the same prefix, so we have supply and sublet, suppress and sublime, and many more.
sup is not a word
Sup
Trans is one of the most common. This makes the word transport. There is also sup-, im-, etc.
sup sup
Assuming you mean sup as in "what's up?", it's spelled 'sup.
when happy say sup
its totally sup
sup-abreveation for what is up?what is up dog?
SUP Media's population is 300.