tonelada

metric ton (a unit of mass equal to exactly 1000 kg); English or American ton (a unit of mass equivalent to about 1016 or 907 kg respectively); tonelada, Spanish ton (a traditional unit of mass equivalent to about 920 kg)

From tonel (“tun”) + -ada (“-ful”), from Old French tonel (“little tun, cask”), from tone + -el (“-elle: forming diminutives”), from Late Latin tunna (“tun”), from Proto-Celtic *tunna (“hide, skin”). In reference to the English unit, calqued from English ton. Cognate with Galician and Portuguese tonelada.