The word "dura" refers to something that is hard or tough.
Sentences with «dura»
This was enabled by engineering the implant to have elastic properties similar to those of dura mater, the protective membrane of the central nervous system. (dresden-ipp.de)
My dog chews nylabone dura chew bones, but makes them unusable very quickly, needing to be «refreshed» with a dremel which smooths off the bigger nylon pieces. (caninejournal.com)
«We're seeing more demand for ornate types of items,» confirms Tom Seifert, president of Dura Art Stone. (nreionline.com)