security in English: The work of keeping people and things safe from harm or from thieves. (noun)

Translation

The work of keeping people and things safe from harm or from thieves.

Word origin

From Latin securus, meaning free from care or worry.

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Here "security" is the checking that keeps people safe.

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"Security" can also mean the people who do that work.

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"Security" is uncountable, so it has no plural.

safe

Not in danger; not able to be hurt or harmed.

protect

To keep someone or something safe from harm or danger.

police

The official group of people whose job is to stop crime and keep people safe.

guard

A person whose job is to watch and protect a place or person.

lock

To close a door or box with a key so no one else can open it.

safety

Being safe, or the care people take to keep away from danger.

surveillance

Watching a person or place carefully and secretly, often by police or cameras.

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