等于 (equal to)

• Pinyin: děngyú
• Formation: A + 等于 + B
• Hanzi breakdown: 等 = 竹 (bamboo) + 寺 (temple); 于 = single character meaning 'at/to'

Meaning

The structure 等于 is used to express that one thing is equal to or equivalent to another. It can be used in mathematical, logical, or figurative contexts to draw equivalences between two things.

While 等于 literally means 'equal to' in a mathematical sense, it is frequently used figuratively to suggest that one action or situation is effectively the same as another. It often carries a tone of emphasis or even exaggeration, implying that doing A is tantamount to doing B. Unlike 就是 which simply equates or identifies, 等于 stresses the logical consequence or equivalence. It is common in arguments, persuasive speech, and analytical writing. In casual speech, 等于说 is a very common variant meaning 'which is to say' or 'in other words.'

Examples

1. 放弃学习等于放弃未来。 Giving up studying is equal to giving up your future.
2. 这次考试不及格等于白费了一个学期的努力。 Failing this exam is equivalent to wasting an entire semester's effort.
3. 你不签合同就等于自动放弃这个机会。 If you don't sign the contract, it's the same as voluntarily giving up this opportunity.

Usage Guide

Context: spoken, written, analytical

Tone: logical

Do Say

• 不努力等于在浪费时间。
• 这样做等于说你同意了他的方案。
• 少了他的支持等于少了一半的把握。

Don't Say

• 他等于是很聪明。(等于 connects two equivalent things or outcomes, not descriptions — use 算是 or simply state the adjective directly) → 他算是很聪明的。
• 我等于去了北京。(等于 expresses equivalence, not simple past action — use 去了 for stating a completed action) → 我去了北京。

Origin & History

The word 等于 combines 等 (equal, same level) and 于 (to, at), forming a verb meaning 'to equal' or 'to be equivalent to.' It has been used in Chinese mathematical and logical discourse since the modern era.

Cultural Context

Generation: All ages

Social background: Universal