Plebeian

Plebeian, which means 'of the people', or 'not aristocratic', or - pejoratively - 'common', 'not refined', is pronounced with the stress on the second syllable, which is a 'long' sound: 'ple-BEE-e^rn', IPA: /plə 'biː ən/.

Plebeian is derived from the Latin noun plebs, which means 'the common people'.

For another adjective derived from the Latin vocabulary for the Roman class system but meaning 'aristocratic', 'refined', see Patrician.