`坚固` taps into a deep-seated Chinese cultural appreciation for durability, stability, and permanence. While a Western concept like “durable” focuses on an item's ability to resist wear over time, `坚固` often implies that this durability comes from an initial, foundational strength. It’s not just that it *lasts*; it’s that it was *built* to be unshakeable from the very beginning. This value is reflected in everything from historical engineering marvels like the Great Wall (万里长城 Wànlǐ Chángchéng) to the modern emphasis on building robust infrastructure. Metaphorically, it extends to social structures. The ideal family unit is `坚固`, with strong, stable bonds. A nation's foundation (国基 guójī) should be `坚固`. This contrasts with a Western “disposable” or “move-fast-and-break-things” culture, highlighting a preference for building things—and relationships—that are meant to endure the test of time.
`坚固` is a standard and slightly formal term used in both written and spoken Chinese. It's almost always a positive descriptor, implying quality and reliability.
The most common mistakes with `坚固` involve confusing it with other “strong” words.