warn

verb

1. 1

   notify, usually in advance

   I warned you that I would ask some difficult questions

2. 2

   ask to go away

   The old man warned the children off his property

3. 3

   notify of danger, potential harm, or risk

   The director warned him that he might be fired

   The doctor warned me about the dangers of smoking

4. 4

   admonish or counsel in terms of someone's behavior

   I warned him not to go too far

   I warn you against false assumptions