The agency was established to regulate the financial industry.

regulate 是动词，由前缀 re-（表示"再次、反复"）和词根 gul（来自拉丁语，意为"规则"）加上动词后缀 -ate 构成，字面意思是"反复按规则行事"，引申为"规范、监管"的意思。