lead (v.) Look up lead at Dictionary.com
"to guide," O.E. lędan "cause to go with one, lead," causative of lišan "to travel," from W.Gmc. *laithjan (cf. O.S. lithan, O.N. liša "to go," O.H.G. ga-lidan "to travel," Goth. ga-leižan "to go"). Meaning "to be in first place" is from c.1380. The noun is first recorded c.1300, "action of leading." Meaning "the front or leading place" is from 1570. Johnson stigmatized it as "a low, despicable word." Sense in card-playing is from 1742; in theater, from 1831; in journalism, from 1927; in jazz bands, from 1934. Leader "one who leads" is from c.1300; as shortened form of leading article (1807) "prominent newspaper piece giving editorial opinion" it dates from 1837. Leadership first attested 1821.
lead (n.) Look up lead at Dictionary.com
"heavy metal," O.E. lead, from W.Gmc. *loudhom (cf. O.Fris. lad, M.Du. loot "lead," Ger. Lot "weight, plummet"). The name and the skill in using the metal seem to have been borrowed from the Celts (cf. O.Ir. luaide, probably from PIE base *plou(d)- "to flow"). Black lead was an old name for "graphite," hence lead pencil (1688) and the colloquial fig. phrase to have lead in one's pencil "be possessed of (esp. male sexual) vigor," first attested 1941 in Australian slang. Adjective form leaden is a relic of O.E. The fig. sense of "heavy, oppressive, dull" is first attested 1577. Lead balloon "a failure" is from 1960, Amer.Eng. slang. Lead-footed "slow" is from 1896; opposite sense of "fast" emerged 1940s in trucker's jargon, from notion of a foot heavy on the gas pedal.