宝库 bǎokù treasure-house
treasure-house; treasury; treasure-trove (often fig., book of treasured wisdom)
How to remember 宝库: 宝 treasure + 库 armory = treasure-house.
Characters
How it is used
- A treasure-house, most often figurative - 知识的宝库 (zhīshi de bǎokù) a treasure-house of knowledge.
- Frequently metaphorical: 艺术宝库、文化宝库 (a rich store of art/culture), praising a source rich in valuable things.
- Literal treasure vaults exist too, but the fig. 'rich repository' sense dominates.