oiled

The word 'oiled' is a straightforward English formation from the base noun 'oil', which traces its lineage to the Latin 'oleum' and ultimately the Greek 'elaion', specifically referring to olive oil. The suffix '-ed', of Germanic origin, is a productive adjectival ending used to denote the state of having been provided with or treated by the root word. Thus, the literal meaning "treated with oil" logically extends to machinery or surfaces made smooth or waterproof by oil application. In informal 20th-century slang, this sense of being lubricated or made smooth was metaphorically applied to a person made loose or unsteady by alcohol, giving rise to the meaning "drunk."

Structure: oil (viscous liquid) + ed (adjective suffix) - oil: From Old French 'oile', from Latin 'oleum' (olive oil, oil), from Greek 'elaion' (olive oil). Functions as the root noun/verb meaning a viscous liquid. - ed: From Old English '-ed', '-od', '-ad', a past participle suffix used to form adjectives indicating a state or condition.