lard

Lard comes from Middle English lard, borrowed from Old French lard, meaning "bacon," which traces back to Latin lārdum or lāridum, meaning "bacon fat."

The word narrowed over time from naming bacon itself to naming specifically the rendered fat associated with it.

The verb "to lard," meaning to coat or interlace with fat, comes from the same root by way of Middle English larden, from Old French larder and Medieval Latin lārdō.