détrousser

A literary/archaic verb straight out of highwayman stories: to rob a traveler, typically at knifepoint or gunpoint on the road. It survives mainly in older fiction and fixed phrases like détrousseur de grand chemin (highwayman) rather than in ordinary modern speech.

• Les bandits détroussaient les voyageurs sur cette route isolée. — Bandits used to rob travelers on this isolated road.
• Il fut détroussé de sa bourse en pleine nuit. — He was robbed of his purse in the dead of night.
• Le roman raconte l'histoire d'un brigand qui détroussait les riches marchands. — The novel tells the story of a brigand who robbed wealthy merchants.

Using détrousser for an everyday mugging or theft sounds deliberately old-fashioned or literary — a modern crime report would say voler or braquer, not détrousser, which belongs to period fiction.