"Η άμεση δράση."

Translation: The immediate action.

[D_..]

"Άμεση δράση" is what the emergency police service is called in Greece. Alternatively it is called "Το εκατό" (literally "The one hundred"), because that is the number to call, like 911 in the U.S.

[jeanprendiville]

Nice, and could be very useful. Thanks.

[mizinamo]

Should "first aid" be accepted, then? That's what I put but it got rejected.

Or "first responder(s)" or "emergency response"?

[D_..]

First aid = πρώτες βοήθειες (only in plural), but it's the ambulance service, not police emergency service.

[taniakol]

I agree it should be, in an actual translation I would put "first aid" or "emergency services" because that's the English equivalent

[jss.___]

άμεσος:

• α- negation

• μέσος: mean, middle, medium

Immediate:

• in/im: negation

• "mediate": means, medium...