oily

the word "oily" is a straightforward english formation, combining the noun "oil" with the productive adjectival suffix "-y". the root "oil" itself has a long history, tracing back through old french and latin to the greek "elaion" (olive oil), which is derived from "elaia" (olive tree). the suffix "-y", of old english/germanic origin, is used to create adjectives meaning "characterized by" or "resembling". thus, the literal construction "full of oil" or "like oil" perfectly captures the word's core meanings, from the physical property of being greasy to the metaphorical sense of an unpleasantly smooth or ingratiating manner.

Structure: oil (a greasy liquid) + y (adjective-forming suffix) "oil" (from Old French 'oile', from Latin 'oleum', meaning 'olive oil, oil', from Greek 'elaion', meaning 'olive oil'); a noun root denoting a greasy, viscous liquid. "y" (from Old English '-ig', a common Germanic suffix used to form adjectives from nouns, meaning 'having the quality of, full of').