prevent the occurrence of; prevent from happening
同义词：debar??/??obviate??/??deflect??/??avert??/??head off??/??stave off??/??fend off??/??avoid
avert, turn away, or repel
英汉双解词典包含3185865条英汉词条，基本涵盖了全部常用单词的翻译及用法，是英语学习的有利工具。