Akademik

heart and soul
I
noun
the choicest or most essential or most vital part of some idea or experience
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the gist of the prosecutor's argument

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the heart and soul of the Republican Party

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the nub of the story

Syn:
kernel, ↑substance, ↑core, ↑center, ↑centre, ↑essence, ↑gist, ↑heart, ↑inwardness, ↑marrow, ↑meat, ↑nub, ↑pith, ↑sum, ↑nitty-gritty
Derivationally related forms: ↑summate (for: ↑sum), ↑pithy (for: ↑pith), ↑meaty (for: ↑meat), ↑essential (for: ↑essence), ↑central (for: ↑center)
Hypernyms: ↑content, ↑cognitive content, ↑mental object
Hyponyms: ↑bare bones, ↑hypostasis, ↑quiddity, ↑haecceity, ↑quintessence, ↑stuff
II
adverb
with complete faith
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she was with him heart and soul

Syn: ↑body and soul

* * *

WHOLEHEARTEDLY, enthusiastically, eagerly, zealously; absolutely, completely, entirely, fully, utterly, to the hilt, one hundred per cent.
heart

* * *

adverb
: without reservations : completely, wholly

count on me to help heart and soul

* * *

heart and hand or heart and soul
1. With complete sincerity
2. With complete devotion to a cause
• • •
Main Entry:heart

* * *

heart and ˈsoul idiom
with a lot of energy and enthusiasm

They threw themselves heart and soul into the project.

Main entry:heartidiom

Useful english dictionary. 2012.