Potion
Middle English: from Old French, from Latin potio(n- ) ‘drink, poisonous draught’, related to potare ‘to drink’.
wiktionary
From Middle English pocioun, borrowed from Old French pocion, from Latin pōtiō(“a drinking”), potiōnis, from pōtāre(“to drink”). Doublet of poison.
etymonline
potion (n.)
c. 1300, pocioun "medicinal drink, dose of liquid medicine or poison," from Old French pocion "potion, draught, medicine" (12c.), from Latin potionem (nominative potio) "a potion, a drinking," also "poisonous draught, magic potion" (source also of Spanish pocion "potion," ponzoña "poison," Italian pozione "potion"), from potus, irregular past participle of potare "to drink," from PIE root *po(i)- "to drink." A doublet of poison (n.). By early 15c. specifically as a magical or enchanted drink.
