against
prep.美 /əˈɡenst/英 /əˈɡenst/
反对；靠着；紧贴
opposed to; touching or supported by a surface
例句
Many students are against having tests on Friday.
很多学生反对周五考试。
She leaned against the classroom door and smiled.
她靠在教室门上笑了。
怎么记
a-（表加强）+gain（对抗）+st → 强力对抗→ 反对
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