cork (n.)
c.1300, from Spanish alcorque "cork sole," probably via Arabic and ultimately from Latin quercus "oak" (see Quercus) or cortex (genitive corticis) "bark" (see corium).
Cork
place in Ireland, anglicized from Irish Corcaigh, from corcach "marsh."
cork (v.)
1570s, "to put a cork sole on a shoe," from cork (n.)). Meaning "to stop with a cork" is from 1640s. Related: Corked; corking.