negatived的音标？

The deep mud negatived all the efforts to advance.这路太泥泞使所有前进的努力都白费劲.His experiment negatived the theory.他的实验驳斥了这个理论.The suggestion was negatived by the school board.这提议被教育委员会否决了....

v.消极的( negative的过去式和过去分词 )，负的，拒绝的，无预期结果的...