That said, the most famous and authoritative etymological dictionary for Spanish is (later expanded by José Antonio Pascual). The RAE often relies on Corominas’s work.
However, it’s important to clarify a key fact: diccionario etimologico rae
Instead, the RAE’s etymological information is embedded within its flagship dictionary: the Diccionario de la Lengua Española (DLE). For each entry, the DLE includes a brief etymological note in square brackets [ ] indicating the word’s origin (e.g., Latin, Arabic, Greek, a Germanic language, etc.). That said, the most famous and authoritative etymological