Neverisms A Quotation Lover's Guide

When we strongly encourage people to do something, it's called an exhortation. But what is the proper term for strongly discouraging people? One candidate is admonition. Another is dehortation, the opposite of exhortation. But perhaps the best term for an emphatic piece of dissuasive advice is neverism. You won't find the term in any dictionary (at least not yet) because quotation anthologist Dr. Mardy Grothe coined it himself for this collection of nearly two thousand quotable cautionary warnings.