As a verb, it means to take liquid into your mouth and swallow it. As a noun, it can mean any liquid you drink, or specifically an alcoholic beverage.
From Old English 'drincan', from Proto-Germanic '*drinkaną', related to German 'trinken' and Dutch 'drinken'. The core meaning has stayed the same for centuries. The noun use grew naturally from the action.
Humans are one of the few species that regularly drink things besides water—milk, juice, alcohol, coffee, tea. 'Going for a drink' often means alcohol without ever naming it directly. The word has quietly become as much about social rituals as about survival.
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