rowdy

Compared meaning: a person who causes trouble or harm (noun).

比较义项：行为不端、给他人带来麻烦或伤害的人（名词）。

• bully

  Bully specifically targets someone weaker, implying repeated intimidation or cruelty toward a particular victim; strongly negative, often used for a person who abuses power.

  bully 特指欺负比自己弱小的人，强调针对某个具体对象反复进行恐吓或欺凌，语气强烈负面，常用来形容滥用力量或权势的人。

  The playground bully threatened to hurt anyone who challenged him.

  操场上的这个 bully 威胁说，谁敢挑战他，就要打谁。

• rowdy 本词

  Rowdy describes noisy, boisterous, unruly behavior in a group, without necessarily implying malice or a specific victim; often used for over-excited crowds or children, sometimes mildly.

  rowdy 形容一群人吵闹、粗野、不守规矩的行为，不一定带有恶意，也不针对某个具体对象，常用来形容过于兴奋的人群或孩子，语气可以比较轻微。

  The rowdy children ran around the classroom, shouting and knocking over chairs.

  这群 rowdy 的孩子在教室里到处乱跑，大喊大叫，还把椅子撞倒。

• hooligan

  Hooligan is the strongest and most negative term, describing a young person who deliberately causes violence or property damage, often as part of a group, as with football hooligans.

  hooligan 是三者中语气最强、最负面的词，指故意实施暴力或破坏财物的年轻人，常以团伙形式出现，例如足球流氓（football hooligans）。

  A gang of hooligans vandalized the park benches and scared away visitors.

  一伙 hooligan 破坏了公园的长椅，把游客都吓跑了。

Bully, rowdy, and hooligan can all mean a troublemaker, but the degree differs. Bully targets someone weaker, with repeated intimidation. Rowdy describes noisy, unruly behavior in a group, without malice. Hooligan is the strongest word, for someone who deliberately causes violence, often in a group.

这三个词都可以指行为不端、惹麻烦的人，但语气和侧重不同：bully 强调恃强凌弱、针对某个具体对象的恐吓；rowdy 语气较轻，只强调吵闹、粗野，不一定带恶意；hooligan 语气最重，强调暴力破坏，常指结伙闹事的年轻人。