means A soft, silvery-white metal (chemical symbol Sn) used to coat steel, make alloys like bronze and solder, and line cans — often standing loosely for the cheap, thin metal of food tins and toy whistles.

from An old Germanic word that has barely changed in a thousand years — Old English 'tin', cousin to Dutch 'tin' and German 'Zinn'. Its chemical symbol Sn comes from a separate root: the Latin 'stannum', which originally meant an alloy of silver and lead before it settled on this metal. Where the Germanic word itself came from before that is genuinely unknown.