chief

Compared meaning: the person in charge of a group (noun).

比较义项：机构或团体的负责人、领导（名词）。

• head

  General term for the person in charge of an organization, department, or team; common in everyday titles like 'head teacher' or 'head of department'; neutral register.

  泛指负责某机构、部门或团队的人；常用于日常头衔，如“head teacher”（教务主任）、“head of department”（部门主管）；语域中性。

  She was recently promoted to head of the marketing department.

  她最近被提升为市场部负责人。

• chief 本词

  Implies a more formal or official position of authority, often in law enforcement, military, or traditional leadership; frequently used in fixed titles like 'chief of police'.

  带有更正式、更具官方权威色彩的意味，常见于警察、军队或传统部落的领导职位；常用于固定头衔，如“chief of police”（警察局长）。

  The chief of police announced new safety measures for the city.

  警察局长宣布了针对该市的新安全措施。

Head and chief both mean the person in charge of an organization. Head is neutral, common in titles like 'head teacher'. Chief is more formal, suggesting official authority, common in titles like 'chief of police'. Not compared: head meaning the body part.

head 和 chief 都可以指某个机构或团体的负责人，但语域和典型搭配不同：head 语气中性，常见于教育、企业等日常职衔；chief 语气更正式，常带有权威色彩，多见于警察、军队或部落等场合的固定头衔。这里不比较 head 的“头部”义项（如例句“她转头看是谁在叫她”所示）。

Compared meaning: most important or main (adjective).

比较义项：主要的，重要的（形容词）。

• chief 本词

  Formal and typically placed right before a role, title or abstract noun (chief negotiator, chief concern) to mark the single foremost one; rarer in casual speech than primary or big.

  语气正式，通常直接放在职位、头衔或抽象名词前（如 chief negotiator，chief concern），表示“首要的那一个”；在日常口语中不如 primary 和 big 常用。

  The chief negotiator flew to Geneva to finalize the peace treaty.

  首席谈判代表飞往日内瓦，敲定了这项和平条约。

• primary

  Neutral and common in formal or academic writing when singling out the most important item among several goals, reasons or objectives; not used as a job title the way chief is.

  语气中性，常用于正式或学术写作中，用来在多个目标、原因或目的中指出最重要的那一个；不像 chief 那样可以用作职位头衔。

  Reducing costs is not our primary objective this quarter.

  降低成本并不是我们这个季度的主要目标。

• great

  Highlights outstanding quality, eminence or admiration rather than simply ranking one thing first; used for people and achievements, not for singling out one item from a list.

  强调杰出、卓越或令人钦佩，而不只是表示在排序中排在第一位；常用来形容人物和成就，而不是从一系列事物中挑出最重要的一项。

  She became one of the great scientists of the twentieth century.

  她成为二十世纪最伟大的科学家之一。

• big

  Informal, everyday word for something significant that affects your life, such as a decision, deal or day; sounds casual rather than official, unlike chief and primary.

  口语化、日常用词，用于描述会影响生活的重要事情，比如决定、交易或日子；语气随意，不像 chief 和 primary 那样正式。

  Choosing a college is a big decision, so take your time.

  选大学是一个重要的决定，所以要慢慢考虑。

Chief, primary, great, and big can all mean most important. Chief and primary are formal, used to name the single foremost item, like a chief concern or primary goal. Great stresses outstanding quality, not rank. Big is informal. Not compared: great (pleasant), big (large size).

这几个词在“主要的、重要的”这个意义上很接近，但正式程度和语气不同：chief 和 primary 更正式，用于列出首要的一项；great 强调“杰出、卓越”，语气更强烈；big 是口语化说法，语气随意。这里不比较 great 表示“愉快的、极好的”的用法（例如 We had a great time），也不比较 big 表示“体积大”的用法（例如 a big dog）。