The idiom "bone of contention" has roots in medieval English, where it originated from the literal meaning of a "bone" as an object of dispute or contention between two dogs. The phrase evolved to describe any contentious issue or subject that serves as a cause for disagreement or conflict between individuals or groups. Over time, it transitioned from its literal origins to a metaphorical usage, becoming a common expression in the English language to denote a central point of disagreement or conflict.

Definición y significado de "bone of contention"en inglés

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