What does "back up" mean?

To support someone's statement To confirm or corroborate what someone says.

How do you use "back up" in a sentence?

Can anyone back up his story? She backed me up in the meeting. The evidence backs up his claim.

Phrasal Verb BritishAmericanAustralian ★★★★★ Very Common Neutral

Meaning: To support someone's statement

支持、证实

Respaldar a alguien

支持する、裏付ける

지지하다, 뒷받침하다

To confirm or corroborate what someone says.

确认或印证某人的说法。

Confirmar o corroborar lo que alguien dice.

誰かの発言を確認したり、裏付けたりすること。

누군가의 말을 확인하거나 입증하다.

Base verb: back

Particle: up

Separable: Yes — the object can go between the verb and particle

Can anyone back up his story?
有人能证实他的话吗？
¿Alguien puede corroborar su historia?
彼の話を裏付けられる人はいますか？
그의 이야기를 뒷받침해 줄 사람이 있나요?
She backed me up in the meeting.
她在会上支持了我
Me respaldó en la reunión
会議で彼女は私を支持してくれた
회의에서 그녀가 나를 지지해 주었다.
The evidence backs up his claim.
证据支持他的说法
Las pruebas respaldan su afirmación
証拠は彼の主張を裏付けている
증거가 그의 주장을 뒷받침한다.

Context: support, confirmation

Tone: supportive

From providing backup support.

Era: Modern

Generation: All ages

Social background: Universal