Lifeblood

n.energetic, resilientwarm

What it means

The indispensable source of energy or support that keeps something thriving.

Reach for it when identifying a sustaining contribution whose removal would seriously weaken a group or activity

Daily readers are the lifeblood of the independent neighborhood newspaper.

playful
fuel
an input supplies energy for continued effort
not when Fuel is consumed by the process, unlike people or relationships that should be renewed.
everyday
backbone
a dependable group or structure provides core support
not when Backbone emphasizes structural strength, while lifeblood conveys continuing energy and renewal.
warm
heart
the emotional or human center deserves recognition
not when Heart locates identity and feeling but may not be the practical sustaining resource.
professional
engine
a force actively drives growth or activity
not when Engine suggests propulsion and output rather than nourishment.
professional
mainstay
one reliable element supports long-term stability
not when A mainstay can be static and need not circulate energy through the whole organization.
formal
cornerstone
a foundational element supports everything built around it
not when A cornerstone establishes a base; lifeblood is an ongoing supply.
literary
vital force
animating energy is the central image
not when Vital force is abstract and can sound mystical in operational writing.

economic lifeblood
Small manufacturers remain the economic lifeblood of the valley.
lifeblood of the community
Shared meals are the lifeblood of the community during hard winters.
creative lifeblood
Curious apprentices became the workshop's creative lifeblood.

The definition and the example on this page are written here. The dictionaries above ground which meaning is being described, not the wording.