passionately urge; strongly urge
I admonish you not to marry him. I've known him for ten years, and I can assure you that he isn't fit for human company, much less marriage.
ad (to)#monere (to remind, warn, advise) (Latin)
to avoid A DEMON-ish act, a mother Warns her naughty child [Note: A face of a demon as the warning Sign]