Avertissement, nm : a warning, caution, foreword.

The French word « avertissement » looks very similar to the English word “advertisement.”

The most common meaning of “advertisement” in English is “a commercial on TV or radio” or ” a printed publicity or promotion.”

In French, « avertissement » can mean a warning, caution, a prior warning, or a foreword.

Les alpinistes n’ont pas tenu compte des avertissements, ils sont partis quand même.
The climbers didn’t pay attention to the warnings; they left anyway.

Cet élève a eu trois avertissements pour indiscipline.
This student has had three warnings for bad behaviour.

Il a démissionné sans avertissement.
He resigned without prior warning.

Il y a parfois un avertissement en tête de livre.
There is sometimes a foreword at the beginning of a book.