back

Compared meaning: located at or toward the back (adjective).

比较义项：后面的，位于后部（形容词）。

• back 本词

  The everyday, informal word for something located behind the front; common in casual speech and everyday compounds like 'back door' or 'back seat'.

  back是日常、非正式的用词，指位于前部之后的部分；常见于口语及“back door”（后门）、“back seat”（后座）等常见搭配。

  Can you grab my jacket from the back seat?

  你能帮我从后座拿一下外套吗？

• rear

  A more formal or technical word for the back part, often used for vehicles, buildings, or military contexts; less common in casual everyday speech.

  rear是更正式或技术性的用词，常用于描述车辆、建筑物或军事场景中的后部，在日常口语中不太常用。

  The mechanic replaced both rear tires this afternoon.

  今天下午技师换了两个后轮胎。

Back and rear both describe the part behind the front. Back is the everyday, informal word, common in casual speech, as in back door or back seat. Rear is more formal or technical, often used for vehicles, buildings, or military contexts.

back和rear在这个义项上都表示“位于后部的”，但back是常见的日常用词，用法更随意；rear更正式、书面或技术性，常见于车辆、建筑物等语境。这里不比较back的其他义项（如名词“背部”、副词“往回”）和rear的其他义项（如动词“抚养、饲养”）。

Compared meaning: to support someone or something (verb).

比较义项：支持（动词）。

• back 本词

  Informal and versatile; means to give support or backing to a person, plan, or side, often implying loyalty, financial help, or standing behind someone in a dispute.

  较为口语化、用法灵活，指在背后支持某人、某项计划或某一方，常暗示忠诚、提供经济帮助，或在争执中支持某一方。

  Her family backed her decision to quit her job and travel.

  她的家人支持她辞职去旅行的决定。

• support

  The most neutral and general term; means to give help, encouragement, or emotional, financial, or practical assistance, without endorse's public, formal tone.

  语气最中性、最通用，指给予帮助、鼓励，或提供情感、经济、实际方面的援助，没有endorse那种公开、正式的意味。

  Her parents supported her through years of medical school, both emotionally and financially.

  她的父母在她读医学院的那些年里，从精神上和经济上都支持她。

• endorse

  Formal; means to publicly state approval or support for something, especially a candidate, product, or policy, often through an official statement or advertisement.

  较为正式，指公开表态支持或认可某事物，尤其用于候选人、产品或政策，常通过正式声明或广告的形式表达。

  The senator publicly endorsed the new healthcare bill before the vote.

  这位参议员在投票前公开表示支持这项新的医保法案。

Back, support, and endorse all mean to support someone. Back is informal, meaning to stand behind a person, often with loyalty or money. Support is the most neutral, meaning to give help or encouragement. Endorse is formal, meaning to publicly approve of something.

这三个词在“支持”这个意义上相近，但语气和使用场合不同：back较口语化，指在背后支持某人或站在某一方；support语气中性，指提供帮助、鼓励或资源；endorse较为正式，指公开表态支持，常用于代言、认可候选人或产品。这里不比较back的“返回”“背部”等义项，也不比较endorse的“签署”义项，也不比较support的“支撑（物理重量）”义项。