tonel
barrel
ton
a large amount
+
-el
diminutive suffix
Tonel means barrel. Think of it as a ton0 (a large amount0) in a small -el1 (diminutive1) container, which is essentially what a barrel is.
noun
- barrelA large barrel or cask, especially for wine or other liquids.El vino se fermenta en toneles de roble. // The wine is fermented in oak barrels.