cautionary

Adjective

 * 1) Serving to caution or warn; admonitory
 * 2) Serving to ward off; preventive
 * 3)  Held as security or hostage

Quotations

 * 2003 Paul Magdalino - Byzantium in the Year 1000
 * Constantine's provision seems drawn from recent experience and intended for practical application, rather than being just a form of cautionary tale . ..

Translations

 * Spanish: precautorio