greased

The word 'greased' is built upon the noun 'grease,' which entered English via Old French from the Latin crassus, meaning thick or fat. The adjectival suffix '-ed' is a native English morpheme used to form participial adjectives, indicating a state or condition. Thus, the literal construction is "characterized by grease." The primary meaning directly reflects this: something coated with a thick, oily substance to reduce friction. The informal sense of something made "smooth" or "easy," as in "greased the wheels" or "a greased palm," is a metaphorical extension of this lubricating property, where social or bureaucratic friction is reduced through illicit or facilitative action.

Structure: grease (fat) + ed (adjective suffix) - grease: From Old French graisse, gresse, meaning "fat, grease," from Latin crassia (fatty part), from crassus (thick, solid, fat). Functions as the core root denoting a fatty/oily substance. - ed: From Old English -ede, -od, -ad, a suffix forming adjectives from nouns or verbs, indicating "having the quality of" or "characterized by." Functions as a participial/adjectival suffix.