[syn: warn, discourage, admonish, monish]
The Collaborative International Dictionary of English v.0.48:
Monish \Mon"ish\, v. t. [OE. monesten. See Admonish,
   Monition.]
   To admonish; to warn. See Admonish. [Archaic] --Ascham.
   [1913 Webster]
WordNet (r) 3.0 (2006):
monish
    v 1: warn strongly; put on guard [syn: caution, admonish,
         monish]
    2: 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" [syn: warn,
       discourage, admonish, monish]