WordReference English-Italiano Dictionary © 2026:
| Principal Translations/Traduzioni principali |
| fastness n | (state of being secure) | sicurezza nf |
| | The fastness of the politician's ideals make him an excellent candidate for the party. |
| fastness n | (permanence) | permanenza nf |
| | | resistenza nf |
| | The researcher developed a new process to test the fastness of various adhesives. |
| | La ricercatrice ha sviluppato un nuovo procedimento per testare la permanenza di vari adesivi. |
| fastness n | (dye: permanence) (tinta) | resistenza, solidità nf |
| Nota: Often used as a suffix: colour fastness, lightfastness |
| | The company is testing a new additive to improve the fastness of their dyes. |