admonish

(v) admonish or counsel in terms of someone's behavior
- I warned him not to go too far
- I warn you against false assumptions
- She warned him to be quiet
monish, warn, discourage,
(v) warn strongly; put on guard caution, monish,
(v) take to task
- He admonished the child for his bad behavior
reprove,

monish warn discourage caution reprove

admonisher admonishing admonishment