observation
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Keep your eyes peeled
To look very carefully and be on the alert for something specific or anything unusual.
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Still waters run deep
Quiet or reserved individuals often possess a profound and complex character that is not immediately apparent.
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Before your very eyes
Happening directly in front of someone, emphasizing a sudden, noticeable, or surprising event that is undeniable.
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Keep one's eyes open
To remain alert and watchful, or to be on the lookout for something specific.
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Cast an eye over
To quickly look at something or someone, often to check or review it briefly.
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A fly on the wall
An unseen observer who witnesses events without being noticed or influencing them.
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Right under your nose
This phrase refers to something that is immediately visible or nearby but remains unnoticed or undiscovered.
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An invisible witness
Someone or something that observes an event or situation without being detected or known by those involved.
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a fly on the wall told me
This phrase is a humorous way of saying that one has obtained information or witnessed an event discreetly, as if being an unnoticeable observer.
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A glance tells all
A single, quick look can reveal everything important or necessary to understand a situation or someone's true feelings.
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A sign of life
An indication that someone or something is still active, existing, or functional, especially after a period of silence, dormancy, or doubt.
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A hidden advantage
An unseen benefit or positive attribute that only becomes apparent under certain circumstances or upon closer inspection.
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Be all eyes and ears
To pay extremely close attention, observing and listening intently to everything around you.
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Sharp-sighted
Having unusually keen vision or a highly developed ability to notice details.
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There's more than meets the eye
Something is more complex, interesting, or significant than it initially seems.
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Sign of trouble
An indication or precursor that difficulties or problems are likely to arise.