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 only extant language in this branch is Modern Greek. Greek is one of the oldest Indo-European languages. Mycenaean dates from 1300BC. The Ancient Greek of Homer was written from around 700BC. The major forms were Doric (Sparta), Ionic (Cos), Aeolic (Lesbos), and Attic (Athens). The latter is Classical Greek.