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to rear its (ugly) head
01
Трудной, неприятной проблемы
(of a problem or unpleasant situation) to appear or become noticeable often unexpectedly
![to [rear|raise] its (ugly|) head definition and meaning](https://cdn.langeek.co/photo/46625/original/?type=jpeg "to [rear|raise] its (ugly|) head definition and meaning")
неодобрительное
идиома
неформальное
Примеры
The old problem reared its ugly head during the final stage of the project.
