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3. heart and soul

heart and soul

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heart and soul

Fig. the central core [of someone or something]. Now we are getting to the heart and soul of the matter. This feature is the heart and soul of my invention.

See also: and, heart, soul

heart and soul

The entirety of one's energies or affections. For example, He put heart and soul into his music. [Late 1700s]

See also: and, heart, soul

heart and soul

Completely; entirely.

See also: and, heart, soul