Inform (someone) of a possible future danger or problem; forewarn.Every traveller is premonished by the oft-repeated advertisement that 'baggage is at the risk of the owner'....
The United States, he premonished, could not hope to remain an island of democracy in a totalitarian sea.
We premonish both ourselves and others, that no single visit should exceed a quarter of an hour.
Origin
Mid 16th century: from Latin praemonere 'forewarn' with the ending altered after the pattern of admonish.