This is the 1986th most frequent Chinese word.
盾
Shield.
In this sentence, '盾' is used as part of the compound '盾牌,' which means a physical shield used for protection.
这个盾牌非常坚固。
This shield is very sturdy.
Here, '盾' is used to refer to the object utilized for protection in a defensive action.
他用盾挡住了攻击。
He used a shield to block the attack.
In this context, '盾' is used metaphorically to represent a protective or defensive strategy or argument.