tonel

barrel; barrel roll

“Al contrario, con lastre se tiene uno mejor en pie. Es que no existo. Mira, ahora poco, al cenar me parecía como si todo eso me fuese cayendo desde la boca en un tonel sin fondo.”

From Old French tonel (“barrel”), diminutive of tone (“large barrel”), from Late Latin tunna, from Proto-Celtic *tunna (“hide, skin”). Probably entered through Old Galician-Portuguese or Old Aragonese, where it seems to have been borrowed earlier. Cognate with Galician and Portuguese tonel and Catalan tona.