Vessel
Middle English: from Anglo-Norman French vessel(e ), from late Latin vascellum, diminutive of vas ‘vessel’.
wiktionary
From Middle English vessel, vessell, from Old French vaissel (compare modern French vaisseau), from Latin vāscellum, diminutive of vāsculum, diminutive of vās(“vessel”).
etymonline
vessel (n.)
c. 1300, "container," from Old French vessel "container, receptacle, barrel; ship" (12c., Modern French vaisseau) from Late Latin vascellum "small vase or urn," also "a ship," alteration of Latin vasculum, diminutive of vas "vessel." Sense of "ship, boat" is found in English from early 14c. "The association between hollow utensils and boats appears in all languages" [Weekley]. Meaning "canal or duct of the body" (especially for carrying blood) is attested from late 14c.