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calm waters run deep
/kɑːm ˈwɔːtərz rʌn dip/◆proverb
people who appear quiet or reserved often have profound thoughts or emotions
Don't underestimate her; calm waters run deep.
She seems quiet, but she has deep wisdom and strong emotions.
informal
A proverb suggesting that people who appear calm, quiet, or unassuming often have deep thoughts, emotions, or wisdom that are not immediately obvious.
He never speaks much in meetings, but calm waters run deep—his ideas are always insightful.
He is quiet in meetings, but his contributions are always thoughtful and valuable.
She may seem shy, but calm waters run deep; she has a lot to offer when she opens up.
She appears reserved, but she has deep insights and talents.
This phrase is often used to advise against judging people based on their outward demeanor.
Related Phrases
Pro Tip
Usage Context
Use this phrase when someone is underestimated due to their quiet nature.
Gold Rule
Avoid Misinterpretation
Do not use this phrase to describe literal bodies of water; it is strictly metaphorical.
Word Origin
The phrase originates from the observation that calm or still water often hides depth, suggesting that outward appearances can be deceiving.
Usage Notes
This phrase is commonly used to describe people who are introverted or reserved but possess deep intelligence, wisdom, or emotional depth.
English Dictionary