保卫 (bǎo wèi): 방어하다.

After the war broke out, many young people volunteered to join the army and rushed to the front lines to defend their country.

The police patrol day and night, defending the safety of the citizens so that everyone can live without worry.

In order to defend his family's health, he persists in exercising every day and pays attention to food hygiene.

The soldiers hold their rifles and stand on the border line, vowing to defend every inch of their motherland to the death.