This is the 10727th most frequent French word.
méfier
To distrust or be wary of.
The verb "méfier" is used reflexively here ('se méfier') to indicate caution or distrust towards someone or something.
Il faut se méfier des inconnus.
One must beware of strangers.
"Méfier" is used reflexively ('nous méfier') to highlight a cautionary action about a specific condition.
Elle nous a demandé de nous méfier de la route glissante.
She asked us to beware of the slippery road.
The verb "méfier" is intended to express a sense of alertness or precaution regarding a potentially dangerous entity.