How to Say "heavy-duty" in Spanish
The Spanish word for “heavy-duty” is “reforzado” — B1 level. This is a very common word in everyday Spanish.

Examples
El edificio tiene una estructura de hormigón reforzado.
The building has a reinforced concrete structure.
Esta maleta tiene las esquinas reforzadas para los viajes largos.
This suitcase has reinforced corners for long trips.
Lleva un cristal reforzado que es casi imposible de romper.
It has reinforced glass that is almost impossible to break.
Matching Gender and Number
Since this acts as a description word, it must match what it describes. Use 'reforzado' for one boy-word, 'reforzada' for one girl-word, and add an 's' for more than one.
Describing a Result
When you use this with the word 'está' (is), you are describing the state of something after it has been worked on or fixed.
Using 'fuerte' vs 'reforzado'
Mistake: “La puerta es reforzada.”
Correction: La puerta está reforzada (if someone made it stronger) or La puerta es fuerte (if it's naturally strong).
Related Translations
Learn Spanish with Inklingo
Interactive stories, personalized learning, and more.