She decided to deposit a large sum of money into a high-interest savings account.

deposit 是动词，由前缀 de-（表示"向下"）和词根 posit（来自拉丁语 ponere，意为"放置"）组成，字面意思是"向下放置"，引申为"存放、存入（银行账户）"的意思。在金融领域特指将钱存入银行账户的行为。