aleado
alloyed
alloy
a mixture of metals
+
-ado
past participle suffix
Aleado means alloyed. It's related to the English word alloy0 (a mixture of metals0), with the Spanish suffix -ado1 (past participle suffix1) making it an adjective describing something that has been alloyed.
adjective
- alloyedAlloyed or combined with another metal.El oro aleado es más resistente que el oro puro. // Alloyed gold is more durable than pure gold.