The word 储备 (chǔbèi) is a compound formed by combining two characters with related meanings: 储 (chǔ), which means "to store" or "to save up", and 备 (bèi), which means "to prepare" or "to have in readiness". Together, they create a logical semantic unit where the act of storing (储) is done specifically for the purpose of future preparation or need (备). This formation follows a common pattern in Chinese where two verbs or concepts are joined to express a more specific, composite idea, in this case, "to stockpile" or "to reserve" as a verb, or "reserves" or "stockpile" as a noun. The word exemplifies how Chinese compounds often build meaning through the coordinated relationship of their parts.