against/ə'genst, ə'geɪnst/$ ə'genst/

prep.

➊ opposing or disagreeing with (sb/sth)

➋ in competition with (sb/sth)

➌ next to the surface of sth or touching it

prep.

➊ 反对；违反：Are you for or against the suggestion? 你赞成还是反对这个建议？

◇It's against the law to abuse a child. 虐待孩子是违法的。

◇against sb's orders 违抗某人的命令

◇Eating vegetables in childhood helps to protect you against serious illnesses in later life. 孩童时期吃蔬菜有助于预防以后患重大疾病。

➋ 以…为对手：Jill is playing against Michael in the final. 吉尔将与迈克尔进行决赛。

➌ 靠；倚；碰：a ladder against the wall 靠墙的梯子

用法fight/strive/struggle against sb 中的against可以用with替代。