derailed
adj. B2 Upper Intermediate US //dɪˈɹeɪɫd// UK //dɪɹˈeɪld// de·railed
adj. describing a situation where something suddenly stops working or fails because of an unexpected problem. You use this when a plan or a conversation goes completely off track.
adj. obstructed or diverted from an intended course of action. Often used to describe projects, negotiations, or processes that have been halted by unforeseen complications.
The project was derailed by a lack of funding.
Our holiday plans were completely derailed when the airline went on strike at the last minute.
The peace negotiations were nearly derailed by a series of diplomatic misunderstandings that threatened to undo months of careful mediation between the two factions.
Usage
Commonly used with the verb 'to be' or 'to get'; often followed by the preposition 'by'.