Use your grey cells to solve this puzzle.
grey cells
idiomBrains; a person's ability to think, especially referring to intelligence.
Origin
disputed originCompare grey matter.
The math problem was difficult, so I had to use my grey cells to find the right answer.
The detective sat quietly in his chair, exercising his grey cells to uncover the truth behind the mysterious crime.
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get grey hair from
To acquire great frustration, confusion, or anxiousness from (something or someone).
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give someone grey hair
To give someone great frustration, confusion, or anxiousness.
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gray hat
A morally ambiguous character; an antihero.
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grey area
An area intermediate between two mutually exclusive states or categories, where the border between the two is fuzzy or ill-defined.
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grey matter
Brains; a person's ability to think.
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grey power
The collective political, economic, and social influence of senior citizens, especially when they are mobilized by a common interest.