10 letters · 11 points in Scrabble
adjective unpleasantly and excessively suave or ingratiating in manner or speech
adjective containing an unusual amount of grease or oil
originBorrowed from French oléagineux, borrowed from Medieval Latin oleāginōsus (“oily”), from olea (“the olive tree or its fruit”).
Etymology from Wiktionary, CC BY-SA 3.0