obviate

1. V-T To obviate something such as a problem or a need means to remove it or make it unnecessary. 消除; 使...成為不必要[正式]

The use of a lawyer trained as a mediator would obviate the need for independent legal advice. 聘請受過訓練做調解人的律師，就沒必要再找獨立的法律咨詢了。