late Old English, hosa "covering for the leg," from Proto-Germanic *husan (cf. Old Saxon, Old Norse hosa, Middle High German hose "covering for the leg," German Hose "trousers"), literally "covering," from PIE *(s)keu- "to cover, conceal" (see hide (n.1)). Old French hose, Old Spanish huesa are of Germanic origin. Sense of "flexible rubber tube for liquid" is first attested late 15c.