the.com/rivalry

the only relationship where someone studies you harder than your own mother.

means A competitive relationship in which two or more people or groups strive against each other for the same goal, status, or prize.

from From Latin rivalis, which literally meant 'one who uses the same stream' — rivus being a brook or channel. Two neighbors drawing water from the same river were rivales, and as anyone with a shared resource knows, proximity breeds friction. The word flowed into English in the late 16th century, carrying that original sense of people forever eyeing each other across a contested supply.

word root
From Latin rivalis, people sharing the same stream.
performance fuel
Athletes routinely break records against hated opponents.
longest grudge
Oxford and Cambridge have rowed angrily since 1829.
hidden gift
Your fiercest rival defines your standards, free of charge.
brain effect
Rivals activate reward circuits more than neutral strangers do.
for instance

india pakistan cricket — cricket matches between india and pakistan, drawing 1 billion+ viewers

yankees red sox — boston red sox vs new york yankees, mlb's longest continuous rivalry since 1901

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