معنی کلمه guard

a person or group of people whose job is to protect a person, place, or thing from danger or attack, or to prevent a person such as a criminal from escaping:
prison guards
security guards
There are guards posted (= standing and watching) at every entrance.
Armed guards are posted around the site.
The frontier is patrolled by border guards.

More examples

They tried to buy the guard at the bank off but he told the police and the gang were arrested.
The guards failed to observe who delivered the package.
The border guards stopped me and asked to see my papers.
There are guards on the door to keep out undesirables.
Armed guards were stationed around the airport.

mud guard = گلگير

splash guard = گلگیر اتومبیل وغیره

to guard against danger = مواظب خطربودن

to be on guard = مواظب( کارخود )بودن ،احتياط کردن

نگهبان‌، پاسدار، پاسبان‌، مستحفظ، گارد، احتياط،نرده‌روي‌ عرشه‌كشتي‌، نرده‌ حفاظتي‌، پناه‌، حائل‌،حالت‌اماده‌ باش‌ در شمشير بازي‌ ومشت‌ زني‌ وامثال‌ ان‌،نگاه‌داشتن‌، محافظت‌ كردن‌، نگهباني‌ كردن‌، پاييدن‌

careful watch

sentry, watchman

protection

I stand outside and guard the door.