プログレッシブ和英中辞典(第３版)の解説
じょうじる【乗じる】
1 〔つけ入る〕take advantage of，((文)) avail oneself of; 〔機会をとらえる〕seize ((an opportunity))
- こちらの弱みに乗じて高く売りつけた
Taking advantage of our weakness [helpless situation], he forced it upon us at an exorbitant price. - 彼はすぐ人に乗じられる
He is easily taken advantage of.／((口)) He is 「a sucker [an easy mark]. - 闇やみに乗じて
under cover of darkness - 相手の隙すきに乗じて攻撃した
We attacked them (at a moment) when they were off their guard.
2 〔掛算をする〕multiply⇒かける(掛ける)II 13