de hierro
التعريفات والمعاني
== Spanish ==
=== Adjective ===
de hierro (invariable)
strong; rigid
=== Further reading ===
“de hierro”, in Diccionario de la lengua española [Dictionary of the Spanish Language] (in Spanish), online version 23.8.1, Royal Spanish Academy [Spanish: Real Academia Española], 15 December 2025