Greek

Greek /ˈgriːk/ noun
plural Greeks
Greek
/ˈgriːk/
noun
plural Greeks
Britannica Dictionary definition of GREEK
1 
[count]
a  : a person born, raised, or living in Greece
b  : a person whose family is from Greece
2 
[noncount] : the language of the Greeks
◊ In informal English you can describe something that you do not understand by saying It's (all) Greek to me.

— Greek

adjective