adjective
sturdy
STUR-dee/ˈstɜːrdi/
Strong enough to withstand strain or heavy use.
The sturdy workbench supports the heavy engine block without bending.

Etymology
A form of the verb meaning “to daze” came to mean “dazed,” then “violent.” English meanings such as “fierce” and “strong in fighting” developed into physical strength and solid construction.
In context
10k gold is extremely sturdy it doesn't scratch or bend easily
More examples
- You'll need sturdy boots for the rocky trail.
- We chose a sturdier shelf for the heavy books.
- Even our sturdiest suitcase cracked after years of rough handling.
Forms
sturdy · sturdier · sturdiest
sturdiness noun — The quality of being strong and firm.
sturdily adverb — In a strong, firm manner.