Probably borrowed fromLatinferreus. Bysurface analysis,ferro(“iron”) +-eo.
ferreo (feminineferrea,masculine pluralferrei,feminine pluralferree)
- (rare, relational)iron
- Synonyms:diferro,ferrigno
- (figurative, by extension)resistant,robust
- Synonyms:resistente,robusto
- (figurative, by extension)inflexible,rigid,rigorous
- Synonyms:inflessibile,rigido,rigoroso,risoluto,irremovibile
- disciplinaferrea ―iron discipline
- volontàferrea ―iron will
2019, George Orwell, translated by Nicola Gardini,Nineteen Eighty-Four, Mondadori:Ci voleva pure una certa agilità mentale, la capacità di applicare in un dato momento la logica piùferrea, e di ignorare subito dopo i più grossolani errori di logica.- It needed also a sort of athleticism of mind, an ability at one moment to make the most delicate use of logic and at the next to be unconscious of the crudest logical errors.
- (literally, “It took even a certain mental agility, the capacity to apply in one given moment the mostrigorous logic, and to ignore immediately after the crudest logical errors.”)
- ferreo in Treccani.it –Vocabolario Treccani on line, Istituto dell'Enciclopedia Italiana
ferreō
- dative/ablativemasculine/neutersingular offerreus
