robust

Where it comes from

Robust ordinarily means strong, healthy, and able to withstand difficulty. Robust came through French from Latin robustus, originally oaken and then strong or hardy. Robustus was formed from robur or robus, a word for hard timber, oak, and by extension strength or firmness. The hardness and durability associated with oak became a general description of vigorous bodies and solid objects.

How the meaning developed

Robust later widened to strong flavors, healthy economies, reliable arguments, and computer systems that keep working despite bad inputs or failures.

In use

Instead of “That thing is solid.”
Try “That is remarkably robust.”

“Robust” means sturdy and strong. “Remarkably” says that strength is worth noticing.
Use it for something that can take a beating and keep working.