different between calculating vs steely

English

calculating

calculating (comparative more calculating, superlative most calculating)

(not comparable) Having the ability to calculate.
an early calculating device
(especially of a person) Serving one's own interests in an unemotional, analytical manner.

From steel +? -y.

steely (comparative steelier, superlative steeliest)

Having qualities resembling those of steel, especially hard and resolute.
The bully backed down before his steely gaze.
steely grey hair
- She would unarm her noble heart of that steely resistance against the sweet blows of love.
Made of steel.
- Around his shop the steely sparkles flew.

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