What word describes something that is tough?

There are many words that can describe something tough, depending on the specific context. Here are a few options:

General:

* Tough

* Strong

* Durable

* Resistant

* Hard

* Sturdy

* Robust

* Solid

Figurative:

* Gritty

* Resilient

* Unbreakable

* Indomitable

* Tenacious

* Unyielding

Specific:

* Leathery (for material)

* Rugged (for surface)

* Heavy-duty (for materials or objects)

* Uncompromising (for personality)

Can you provide more context about what you're looking for? Knowing what specifically you're describing (e.g., a material, a person, a situation) will help me give you the most accurate word.