The adjective is derived from Late Middle English potable, from Middle French, Old French potable (modern French potable), and from its etymon Late Latin pōtābilis, from Latin pōtāre + -bilis. Pōtāre is the present active infinitive of pōtō, from Proto-Indo-European *peh₃-. The English word is cognate with Catalan potable, Italian potabile, Spanish potable.
The noun is derived from the adjective.
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