warns

verb

1. 1

   To make (someone) aware of (something impending); especially:

2. 2

   To caution or admonish (someone) against unwise or unacceptable behaviour.

   “Don't let me catch you running in the corridor again, I warn you.”

3. 3

   (chiefly with "off", "away", and similar words) To advise or order to go or stay away.

   “A sign warns trespassers off/away from the site.”

4. 4

   To give warning.