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.

heart and soul

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

heart and soul

Completely; entirely.

Common Names:

Name	Pronounced	Usage
Hyeon-U	hyun-oo	Korean
Deidra	DEE-drə	English
Jaqueline	JAK-ə-leen (English), JAK-ə-lin (English)	English (Modern), Portuguese (Brazilian)
Mizuki	mee-zoo-kee	Japanese
Cadell	-	Welsh
Ivanna	-	Russian (Rare)