porpoise: [14] The porpoise is etymologically the ‘pig-fish’. The word comes via Old French porpois from Vulgar Latin *porcopiscis, a compound formed from porcus ‘pig’ (source of English pork) and piscis ‘fish’ (a relative of English fish) and based on the model of Latin porcus marīnus ‘sea-pig’. The name may have been suggested by the porpoise’s snout. => fish, pork[porpoise etymology, porpoise origin, 英语词源]