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idiom

still waters run deep

STIL WAW-terz RUN DEEP

stɪl ˈwɔːtərz rʌn diːp

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Syllable breakdown

stillwatersrundeep

Dictionary meaning

a quiet or calm exterior often conceals great depth of feeling, intelligence, or complexity; applied to water management, calm aquifer systems may harbour vast hidden reserves whose depletion is not immediately visible on the surface

Examples

  • The village well looked fine but still waters run deep — the aquifer had been dropping a metre per year for a decade.

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