The word Sus is meant to suggest that somone is believed to be Shady or false. They are hiding something or are believed to have a serious character flaw which makes them undesirible as a friend or acqaintence. It is derived from its root word Suspect.
Here is a brief history of the Greek language to help us understand its changes and its evolution. Modern Greek is a descendant of the Ancient language and is affiliated to the part of the Greek or Hellenic branch of Indo-European. After reading about the language, get also informed about the products in Greece.
The Greeks speak the Greek language, which forms its own unique branch within the Indo-European family of languages, the Hellenic. They are part of a group of pre-modern ethnicities, described by Anthony D. Smith as an archetypal diaspora people.