What does "build up" mean?

To increase gradually (excitement, tension) When feelings grow stronger over time.

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

The tension built up. Excitement is building up. Don't let stress build up.

Phrasal Verb BritishAmericanAustralian ★★★★★ Very Common Neutral

Meaning: To increase gradually (excitement, tension)

逐渐增加（兴奋、紧张）

Aumentar gradualmente (emoción, tensión)

（興奮や緊張が）高まる、蓄積する

(흥분이나 긴장이) 점점 고조되다, 쌓이다

When feelings grow stronger over time.

感情随着时间推移变得更强烈。

Cuando los sentimientos se intensifican con el tiempo.

感情が時間とともに強くなること。

감정이 시간이 지나면서 점점 강해지는 것.

Base verb: build

Particle: up

Separable: No — the verb and particle stay together

The tension built up.
紧张感逐渐加剧
La tensión fue en aumento
緊張が高まった
긴장감이 고조되었다.
Excitement is building up.
兴奋感在增长
La emoción va creciendo
興奮が高まっている
흥분이 점점 고조되고 있다.
Don't let stress build up.
别让压力积累
No dejes que se acumule el estrés
ストレスを溜め込まないで
스트레스를 쌓아두지 마세요.

Context: tension, excitement

Tone: growing

From building layer by layer.

Era: Modern

Generation: All ages

Social background: Universal