英和和英

a lookout man

an observation-post

an army of observation

the role of keeping watch

under surveillance

to break through police surveillance

to inspect

keep under surveillance

be kept under surveillance

the Eiffel Tower

take over the watch

Keeping an Eye on Asteroids

supervised play

a person who secretly oversees or observes something

on the farther side from the observer

an observation tower for a lookout to watch over prisoners or watch for fires or enemies

I'm being monitored.

I think I'm being watched.

a vehicle performing sentinel duty

the supervision

You are being watched.

put a person under guard

compliance supervision

Please keep up that surveillance.

a committee having supervisory powers

seemed unaware of the scrutiny

a supervisor

I have to observe her.

I was aware of being watched.

keep a sharp watch [lookout] for…