Lasting a long time or enduring; hard or firm in quality or character.
From Latin 'durus' (hard, lasting) plus English adjectival suffix '-ous.' The word emphasizes both physical hardness and the sense of something that persists over time.
Durous is an old-fashioned adjective that almost disappeared from English, but it's experiencing a mini-revival in materials science and engineering writing where people need to describe things that are both literally hard and figuratively long-lasting.
Complete word intelligence in one call. Free tier — 50 lookups/day.