dérailler

Dérailler is a French verb that literally translates to "to derail" in English. It is most commonly used in a transportation context to describe a train or other rail vehicle becoming dislodged from its tracks. This can occur due to a variety of factors, including track defects, excessive speed, mechanical failure, or external obstructions.

Beyond its literal meaning, "dérailler" is also frequently used figuratively to describe a situation, plan, or conversation that has gone off course or deviated from its intended path. For example, one might say a project has "déraillé" if it has encountered unexpected problems that prevent it from proceeding as planned. Similarly, a discussion could "dérailler" if it becomes sidetracked into irrelevant topics.

The consequences of a literal derailment can range from minor disruptions to major accidents, often resulting in damage to the vehicle, infrastructure, and potential injury to passengers. Figurative derailment implies a loss of control or a failure to achieve a desired outcome. The verb emphasizes a sudden and often unexpected departure from the norm or expected trajectory.