When a country or government liberalizes, or liberalizes its laws or its attitudes, it becomes less strict and allows people more freedom in their actions. 放宽 (限制)
verb [vt. 及物动词]vt. 使自由化;宽大
...authoritarian states that have only now begun to liberalize. …现在刚刚开始放宽限制的独裁国家。
verb [vi. 不及物动词]vi. 自由化
They beat down every attempt to liberalize the press. 他们压制了一切新闻报道自由化的意图。