She withdrew $50 from her savings account.

withdrew 是动词 withdraw 的过去式。withdraw 由前缀 with-（表示"向后、离开"）和动词 draw（"拉、取"）组成，字面意思是"向后拉走"，引申为"取出、撤回"的意思。在金融语境中特指"从银行账户取款"。