New words:

engaged /ɪnˈɡeɪdʒd/

adj. 忙于…… 的;专心投入的
adj. 已订婚的
adj. (电话、座位、房间)被占用的

详细词源拆解:

源自动词 engage(en - 使 + gage 承诺、约束),动词表 “卷入、约定、忙于”;

加后缀 -ed 转化为形容词,语义沿用词根逻辑:

  1. 被事务牵绊 → 忙碌的、投入的;
  2. 立下婚约约定 → 已订婚的;
  3. 被占用 →(场地、线路)使用中的

必记高频搭配

be engaged in 忙于;专心从事

SWhen I came in, he was engaged in writing a short article.

be engaged with 忙于应付;与… 交谈

The teacher is engaged with students after class today.

get engaged 订婚

The young couple got engaged last spring holiday.

fully engaged 全身心投入

All players are fully engaged in the fierce match now.

被占用 →(场地、线路)使用中的

The seat beside the window is already engaged by a girl.

关键使用提醒

  1. 核心固定搭配 be engaged in (doing) sth,表 “忙于 / 专心做某事”
  2. 表 “订婚” 常用搭配:be/get engaged to sb(与某人订婚,介词用 to)

    Her elder sister is engaged to a kind young man.
    她的姐姐和一位善良的青年订了婚。
  3. 区分词义场景:描述人优先 “忙碌 / 订婚”;描述电话、场地多用 “被占用”

    I tried to call you, but your phone was always engaged.
    我试着给你打电话,可你的电话一直占线。
  4. 语体说明:比普通单词 busy 更正式,书面写作、正式场景优先使用

    The scientists are engaged in important research every day.
    这些科学家每日都投身于重要的研究工作。

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