opinion

Compared meaning: an idea or view that something is true (noun).

比较义项：认为某事是真实或存在的想法、看法或直觉（名词）。

• belief

  The strongest and most firmly held of the four; often about deeply held values, religion, or things assumed true without solid proof; typically used as 'belief in something'.

  四个词中语气最强、最坚定的一个，常指对价值观、宗教或未经确凿证明之事的笃信；常见搭配为“belief in something”（对某事的信念）。

  Her strong belief in hard work inspired her whole team.

  她对努力工作的坚定信念激励了整个团队。

• feeling

  The vaguest and most instinctive; an unexplained impression or hunch rather than a reasoned view, often about something being wrong or about to happen.

  四个词中最模糊、最凭直觉的一个，指一种说不清缘由的印象或预感，而不是经过思考得出的看法，常用来表达“隐隐觉得不对劲”之类的直觉。

  I had a strange feeling that something was wrong.

  我有一种奇怪的感觉，觉得有什么地方不对劲。

• notion

  A general, sometimes vague or fanciful idea, often introduced only to be questioned, rejected, or dismissed by the speaker.

  指一种笼统、有时含糊甚至有些异想天开的想法，常用于引出后文要质疑、反驳或否定的观点。

  She rejected the notion that money brings true happiness.

  她拒绝接受金钱能带来真正幸福这种想法。

• opinion 本词

  A personal judgment or view on a debatable matter, openly held and stated, expected to be compared or shared with other people's views.

  指对有争议之事所持的个人判断或看法，通常会公开表达出来，并期待与他人的看法进行比较或交流。

  Everyone in the meeting shared their opinion about the project.

  会议上每个人都分享了自己对这个项目的看法。

Belief, feeling, notion, and opinion all mean an idea that something is true. Belief is the strongest, a firmly held conviction. Feeling is the vaguest, an instinctive impression. Notion is a vague idea, often introduced to be questioned. Opinion is a personal, openly stated judgment.

这四个词都可以表示“想法”或“看法”，但语气强弱和形成方式不同：belief 语气最强，指坚定的信念；feeling 最模糊，凭直觉而非理性；notion 常用于提出一个随后要被质疑或否定的笼统想法；opinion 则是对有争议之事公开表达的个人判断。使用时要注意强度和搭配上的差别，不要随意互换。