obviation
词形变化：
名词: obviation | 动词过去式: obviated | 动词过去分词: obviated | 动词现在分词: obviating | 动词第三人称单数: obviates |
同义词：
avoid | stave off | avert | ward off | fend off | do away with | remove | preclude | forestall | prevent | rid of | head off | eliminate | deflect | debar | forfend | forefend |
反义词：