What does "fight off" mean?

To resist infection To overcome illness through the body's defences.

How do you use "fight off" in a sentence?

My immune system is fighting off a cold. She fought off the infection. Rest helps you fight it off.

Phrasal Verb BritishAmericanAustralian ★★★★★ Very Common Neutral

Meaning: To resist infection

抵抗（疾病），击退（感染）

Combatir, luchar contra

（病気を）撃退する、免疫で戦う

(병을) 이겨내다, 물리치다

To overcome illness through the body's defences.

通过身体的防御机能战胜疾病。

Superar una enfermedad a través de las defensas del cuerpo.

体の免疫力で病気を克服すること。

신체의 면역력으로 질병을 극복하다.

Base verb: fight

Particle: off

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

My immune system is fighting off a cold.
我的免疫系统正在对抗感冒
Mi sistema inmunitario está combatiendo un resfriado
免疫システムが風邪と戦っている
면역 체계가 감기와 싸우고 있다.
She fought off the infection.
她击退了感染
Logró superar la infección
彼女は感染症を撃退した
그녀는 감염을 이겨냈다.
Rest helps you fight it off.
休息有助于战胜疾病
El descanso ayuda a combatirlo
休むと病気と戦いやすくなる
쉬면 병을 이겨내는 데 도움이 된다.

Context: immune system, illness, recovery

Tone: determined

From fighting against attackers.

Era: Modern

Generation: All ages

Social background: Universal