加重 (jiā zhòng): To make heavier (Verb) — Meaning & Stroke Order

Aren't you worried that delaying treatment will worsen the condition?

He did not follow the doctor's advice to rest, which worsened his condition.

The air pollution has worsened, so it's best to wear a mask when going out.

He was sneezing and had a runny nose at the same time, clearly indicating that his cold had worsened.