1.
durability; endurance
The ability to withstand wear, pressure, or damage over time. Used for both physical objects and human endurance.
耐久性に優れた素材だ。
It's a material with excellent durability.
この製品は耐久テストに合格している。
This product has passed durability testing.
耐久レースでは体力だけでなく精神力も試される。
In endurance races, not only physical strength but also mental fortitude is tested.
Almost always appears in compounds or as a modifier: 耐久性 (durability — the most common form), 耐久消費財 (durable consumer goods), 耐久レース (endurance race), 耐久年数 (service life, expected lifespan). The prefix 耐～ means "resistant to" and appears in: 耐水 (waterproof), 耐熱 (heat-resistant), 耐震 (earthquake-resistant). Related: 丈夫 (sturdy — everyday word for toughness), 頑丈 (robust).