What does "brush up on" mean?

To review and improve forgotten skills To refresh your knowledge or skills in something.

How do you use "brush up on" in a sentence?

I need to brush up on my French before the trip. She brushed up on her maths. Time to brush up on interview skills.

Phrasal Verb BritishAmericanAustralian ★★★★☆ Common Neutral

Meaning: To review and improve forgotten skills

复习，温习

Repasar, refrescar

〜を復習する、〜を磨き直す

~을 복습하다, ~을 다시 갈고닦다

To refresh your knowledge or skills in something.

复习并提高已经生疏的技能或知识。

Repasar y mejorar habilidades o conocimientos olvidados.

忘れかけているスキルや知識を復習して改善すること。

잊어버린 지식이나 기술을 다시 복습하여 향상시키다.

Base verb: brush

Particle: up on

Separable: No — the verb and particle stay together

I need to brush up on my French before the trip.
旅行前我需要复习一下法语。
Necesito repasar mi francés antes del viaje.
旅行前にフランス語を復習しないと。
여행 전에 프랑스어를 복습해야 해.
She brushed up on her maths.
她温习了数学。
Repasó sus matemáticas.
彼女は数学を復習した。
그녀는 수학을 복습했다.
Time to brush up on interview skills.
该复习面试技巧了。
Es hora de refrescar las técnicas de entrevista.
面接スキルを磨き直す時だ。
면접 기술을 다시 갈고닦을 때야.

Context: revision, improvement

Tone: practical

From polishing or brushing to improve appearance.

Era: Modern

Generation: All ages

Social background: Universal