obviate
/ˈɒbvɪeɪt/verb
with obj.
1- remove (a need or difficulty)消除（需要, 困难）：
the presence of roller blinds obviated the need for curtains.
有卷帘百叶窗就不需要窗帘了。
1.1
- avoid; prevent避免; 防止：
a parachute can be used to obviate disaster.
降落伞可用于防止灾难。
派生词
obviation
noun词源
late 16th cent.: from late Latin obviat- 'prevented', from the verb obviare, based on Latin via 'way'.