Are yams and sweet potatoes the same?
late 14c. (possibly early 13c.), "rendered fat of a swine," from Old French larde "joint, meat," especially "bacon fat" (12c.), and directly from Latin lardum "lard, bacon, cured swine's flesh," probably cognate with Greek larinos "fat," laros "pleasing to the taste."
"prepare (meat) for roasting by inserting of pieces of salt pork, etc., into it," mid-14c., from Old French larder "to lard" (12c.), from lard "bacon fat" (see lard (n.)). Figuratively, of speech or writing, from 1540s. Related: Larded; larding.
soft, creamy, white solid or semisolid fat with butter-like consistency, obtained by rendering or melting the fatty tissue of hogs. A highly valued cooking and baking fat, lard is blended, frequently after modification by molecular rearrangement or hydrogenation, with other fats and oils to make shortening. Antioxidants are usually added to lard and shortenings to protect against rancidity. Lard is also used in pharmacy and perfumery to make ointments and pomades.