obviate
verb [ T ] formal uk/ˈɒb.vi.eɪt/ us/ˈɑːb.vi.eɪt/
排除，消除；使无必要
to remove a difficulty, especially so that action to deal with it becomes unnecessary
A peaceful solution would obviate the need to send a UN military force. 如果能和平解决就没有必要派遣联合国维和部队了。