The police strengthened security to prevent unauthorized entry into the building.

He entered my room without permission.

That building is very old.

We installed fire alarms to defend our house against fire.

In order to succeed in this project, it is necessary to strengthen teamwork.

We hold meetings every week to strengthen teamwork.

This river overflows as soon as it continues to rain.

The police arrested the unauthorized entrant.

He is in charge of night security.

My job is a security guard.