The verb to regulate means to control something or restrict something or to prevent something from reaching either end of a spectrum or from going to extremes. To regulate is similar in meaning to moderate this is a verb you will find used more often in professional contexts.

1. If you find yourself getting a little cold, you can regulate the temperature in the house by using the thermostat in the sitting room.

1. All these rules and regulations in the property market make it very hard to do business. It can take weeks to get through all the red tape that comes along with making a deal!
2. Global companies work together in order to regulate the price of fossil fuels.

1. The government in that country closely regulates the financial services industry. They fear that deregulation could lead to a financial meltdown.
2. Many financial experts believe that unregulated markets are the best way to increase global trade, and lower prices, as they are free from government interference in the form of tariffs and quotas.